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Thomas Heights
Thomas Heights (-77.78333°N, 163.86667°W) is a line of summit ridges that extend from Bettle Peak eastward to the Scott Coast, Victoria Land. The feature forms a portion of the divide between the lower ends of Ferrar Glacier and Blue Glacier. Named by the New Zealand Antarctic Place-Names Committee (NZ-APC) in 1983 after Arthur A. Thomas of New Zealand at the suggestion of R.H. Findlay, New Zealand Antarctic Research Program (NZARP) geologist to the area, 1977-81.

Thomas Hills
Thomas Hills (-84.35°N, -65.2°W) is a linear group of hills, 17 nautical miles (31 km) long, between Foundation Ice Stream and MacNamara Glacier at the north end of Patuxent Range, Pensacola Mountains. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1956-66. Named by Advisory Committee on Antarctic Names (US-ACAN) at the suggestion of Captain Finn Ronne, U.S. Navy Reserve, leader at Ellsworth Station, 1957. Charles S. Thomas was Secretary of the Navy, 1954-57, during the first few years of U.S. Navy Deep Freeze operations.

Thomas Island
Thomas Island (-66.11667°N, 100.95°W) is a large island in Highjump Archipelago, 6 nautical miles (11 km) long and from 1 to 3 nautical miles (6 km) wide, lying near the center of the main cluster of islands off the north flank of the Bunger Hills. Mapped from air photos taken by U.S. Navy Operation Highjump, 1946-47, and named by the Advisory Committee on Antarctic Names (US-ACAN) for Lieutenant (j.g.) Randolph G. Thomas, U.S. Navy, hydrographic officer with U.S. Navy Operation Windmill, 1947-48, who served as surveyor with the astronomical control parties. == See also == * List of antarctic and sub-antarctic islands

Thomas Mountains
Thomas Mountains (-75.55°N, -70.95°W) is a separate cluster of rocky mountains, about 5 nautical miles (9 km) long, standing 15 nautical miles (28 km) northeast of Mount Horne in eastern Ellsworth Land. Discovered by the Ronne Antarctic Research Expedition (RARE), 1947-48, under Ronne, who named these mountains for noted author and radio commentator Lowell Thomas, a supporter of the expedition.

Thomas Nunatak
Thomas Nunatak (-78.96667°N, -87.46667°W) is the northern of two nunataks which stand close together about 17 nautical miles (31 km) west of the Camp Hills, in the Ellsworth Mountains. Named by the University of Minnesota Geological Party to these mountains, 1963-64, for Hollie Thomas, helicopter crew chief with the 62nd Transportation Corps Detachment, who assisted the party.

Thomas Nunataks
Thomas Nunataks (-70.53333°N, 65.18333°W) is a group of three nunataks lying 2 nautical miles (3.7 km) southwest of Mount Mervyn in the Porthos Range, Prince Charles Mountains. Plotted from ANARE (Australian National Antarctic Research Expeditions) air photos of 1965. Named by Antarctic Names Committee of Australia (ANCA) for I.L. Thomas, physicist at Mawson Station in 1967.

Thomas Peak
Thomas Peak (-72.76667°N, 166.71667°W) is a peak (2,040 m) at the west side of Malta Plateau, situated on the ridge between Wilhelm and Olson Glaciers in the Victory Mountains, Victoria Land. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1960-64. Named by Advisory Committee on Antarctic Names (US-ACAN) for Francis J. Thomas, biologist at McMurdo Station, 1962-63 and 1964-65.

Thomas Rock
Thomas Rock (-75.7°N, 158.6°W) is a small nunatak lying 1 nautical mile (1.9 km) northeast of Tent Rock and 6 nautical miles (11 km) west of Ricker Hills in the Prince Albert Mountains, Victoria Land. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos 1956-62. Named by Advisory Committee on Antarctic Names (US-ACAN) for Kenneth E. Thomas, radioman with the winter party at South Pole Station, 1966.

Thomas Spur
Thomas Spur (-85.88333°N, -161.66667°W) is a prominent spur extending eastward from Rawson Plateau between Moffett and Tate Glaciers, in the Queen Maud Mountains. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1960-64. Named by Advisory Committee on Antarctic Names (US-ACAN) for Harry F. Thomas, meteorologist, South Pole Station winter party, 1960.

Thomas Valley
Thomas Valley (-77.45°N, 162.2°W) is a valley at the east side of McClelland Ridge in the east part of Olympus Range, Victoria Land. Named by Advisory Committee on Antarctic Names (US-ACAN) (1997) after Jean-Claude Thomas, Associate Professor of Geography-Cartography, Catholic University of America, 1967-76, George Mason University, 1976-85; United States Geological Survey (USGS) Cartographer from 1985, specializing in satellite image mapping at various scales, including the 1:25,000-scale color maps of McMurdo Dry Valleys, 1997.

Lake Thomas
Lake Thomas (-77.4°N, 162.25°W) is a meltwater lake that is circumscribed on the northwest and northeast sides by Robertson Ridge and Clark Glacier, in Victoria Land. Named by Advisory Committee on Antarctic Names (US-ACAN) for Robert H. Thomas who participated in United States Antarctic Research Program (USARP) studies of the surface glaciology of the Ross Ice Shelf in the 1973-74 and 1974-75 seasons.

Mount Thomas
Mount Thomas (-71.01667°N, 64.6°W) is a mainly snow-covered mountain about 7 nautical miles (13 km) north of Mount Hicks in the Prince Charles Mountains. It has a domed appearance, with a ridge easterly to a small peak. Plotted from ANARE (Australian National Antarctic Research Expeditions) air photos taken in 1960. Named for I.N. Thomas, radio officer at Wilkes Station in 1963.

Point Thomas
Point Thomas (-62.16667°N, -58.5°W) is a point marking the south side of the entrance to Ezcurra Inlet in Admiralty Bay, on King George Island in the South Shetland Islands. Charted by the French Antarctic Expedition, 1908-10, under Charcot, and named by him for a member of the expedition.

Thompo Icefall
Thompo Icefall (-83.3°N, -50.13333°W) is an icefall at the northeast edge of Saratoga Table between Mount Hummer and Mount Hook, in the Forrestal Range, Pensacola Mountains. Mapped by United States Geological Survey (USGS) in 1967 from ground surveys and U.S. Navy aerial photographs taken in 1964. Named by Advisory Committee on Antarctic Names (US-ACAN) in 1979 after Robert W. Thompson, photographer of U.S. Navy Squadron VX-6 in the Balleny Islands and Sky-Hi Nunataks areas, 1963-64, and in the Pensacola Mountains, 1964-65. Thompo is a nickname by which he and other family members have been known.

Thompson Escarpment
Thompson Escarpment (-79.45°N, -83.5°W) is a steep east-facing escarpment, 8 nautical miles (15 km) long, located at the head of Flanagan Glacier in the Pioneer Heights, Heritage Range. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos. 1961-66. Named by Advisory Committee on Antarctic Names (US-ACAN) for Commander Robert C. Thompson, Operations Officer of U.S. Navy Squadron VX-6 during Deep Freeze 1965.

Thompson Glacier
Thompson Glacier (-66.75°N, 123.65°W) is a channel glacier draining northward to the head of Paulding Bay. Delineated by G.D. Blodgett (1955) from aerial photographs taken by Operation Highjump (1946-47). Named by Advisory Committee on Antarctic Names (US-ACAN) after Egbert Thompson, Midshipman on the sloop Wilkes.

Thompson Island
Thompson Island (-66°N, 110.11667°W) is the largest and northeasternmost of the Balaena Islands, situated about 0.5 nautical miles (0.9 km) from the coast of Antarctica and 15 nautical miles (28 km) northeast of the Windmill Islands. The island consists of two rocky knolls separated by a low saddle of snow (it may actually be two islands connected by ice). This feature was first photographed from aircraft of U.S. Navy Operation Highjump in February 1947, and was mapped from that photography by Gardner Blodgett in 1955. It was visited by a party of the ANARE (Australian National Antarctic Research Expeditions) on January 19, 1956, and named for Richard Thompson, Administrative Officer, Antarctic Division, Melbourne, who was second-in-command for several years of ANARE relief expeditions to Heard Island, Macquarie Island and Mawson Station. == See also == * List of antarctic and sub-antarctic islands

Thompson Mountain
Thompson Mountain (-81.83333°N, 159.8°W) is a mountain, 2,350 m, standing 5 nautical miles (9 km) south of Mount McKerrow in the southwest part of Surveyors Range. Named by the New Zealand Geological Survey Antarctic Expedition (NZGSAE) (1960-61) for Edgar H. Thompson, Professor of Surveying and Photogrammetry at the University College of London, England.

Thompson Nunataks
Thompson Nunataks (-79.45°N, -85.81667°W) is a three evenly-spaced nunataks which he 4 nautical miles (7 km) south of Navigator Peak and surmount the central part of White Escarpment in the Heritage Range, Ellsworth Mountains. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1961-66. Named by Advisory Committee on Antarctic Names (US-ACAN) for Russel W. Thompson, United States Antarctic Research Program (USARP) meteorologist at Wilkes Station, 1963.

Thompson Peak
Thompson Peak (-69.41667°N, 157.66667°W) is a peak (980 m) 5 nautical miles (9 km) south of Ringgold Knoll in the northwest end of Wilson Hills. Plotted by ANARE (Australian National Antarctic Research Expeditions) from aerial photographs taken by U.S. Navy Operation Highjump (1946-47) and ANARE (1959). Named by Antarctic Names Committee of Australia (ANCA) for R.H.J. Thompson, Administrative Officer of the Antarctic Division, Melbourne, second-in-command of several ANARE expeditions to the Antarctic.

Thompson Peaks
Thompson Peaks (-84.43333°N, 166.5°W) is a two peaks on the divide between upper Moody Glacier and Bingley Glacier in the Queen Alexandra Range. Named by Advisory Committee on Antarctic Names (US-ACAN) for Douglas C. Thompson, United States Antarctic Research Program (USARP) cosmic rays scientist at McMurdo Station, 1963; South Pole Station, 1965.

Thompson Peninsula
Thompson Peninsula (-64.46667°N, -63.13333°W) is a peninsula 3 nautical miles (6 km) long forming the north side of the entrance to Fournier Bay, on Anvers Island in the Palmer Archipelago. Surveyed by the Falkland Islands Dependencies Survey (FIDS) in 1955-57, and named by the United Kingdom Antarctic Place-Names Committee (UK-APC) for John W. Thompson of FIDS, general assistant and mountaineer at Arthur Harbor in 1956 and leader at that station in 1957.

Thompson Point
Thompson Point (-70.3°N, 161.06667°W) is a point of land which descends northeastward from Kavrayskiy Hills into the west part of the terminus of Rennick Glacier. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy aerial photographs, 1960-62. Named by Advisory Committee on Antarctic Names (US-ACAN) for Max C. Thompson, United States Antarctic Research Program (USARP) biologist at McMurdo Station, 1966-67.

Thompson Ridge
Thompson Ridge (-76.45°N, -146.08333°W) is a rock ridge, 2 nautical miles (3.7 km) long and trending north-south on the south shore of Block Bay, 3.5 nautical miles (6 km) northwest of Mount Iphigene, in Marie Byrd Land. The feature was photographed and mapped by the United States Antarctic Service (USAS), 1939-41, led by Byrd. The naming was proposed by Admiral Byrd for Gershom J. Thompson, eminent doctor and professor at the Mayo Clinic, who advised on medical questions relating to the Byrd Antarctic Expeditions, 1928-30 and 1933-35, and made financial contributions to them.

Thompson Spur
Thompson Spur (-71.55°N, 160.38333°W) is a large, rugged mountain spur that descends eastward from Daniels Range between the Swanson Glacier and Edwards Glacier, in the Usarp Mountains. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1960-63. Named by Advisory Committee on Antarctic Names (US-ACAN) for David H. Thompson, United States Antarctic Research Program (USARP) biologist at Hallett Station, 1965-66 and 1967-68.

Mount Thompson
Mount Thompson (-70.66667°N, -62.35°W) is a mountain, 1,690 m, standing northwest of Lehrke Inlet and surmounting the central part of the base of Eielson Peninsula, on the east coast of Palmer Land. Discovered by the Ronne Antarctic Research Expedition (RARE), 1947-48, under Ronne, who named this feature for Andrew A. Thompson, geophysicist with the expedition.

Thomsen Islands
Thomsen Islands (-65.78333°N, -66.26667°W) is a group of small islands lying 2 nautical miles (3.7 km) southwest of Speerschneider Point, off the west side of Renaud Island in the Biscoe Islands. First accurately shown on an Argentine government chart of 1957. Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1959 for Helge Thomsen, Danish meteorologist, who, for a number of years beginning in 1946, was responsible for editing Dansk Meteorologisk Institut's annual reports on the state of the sea ice in the Arctic. == See also == * List of antarctic and sub-antarctic islands

Thomson Cove
Thomson Cove (-65.1°N, -63.23333°W) is a cove 1 nautical mile (1.9 km) wide, lying just north of Etienne Fjord in Flandres Bay, along the west coast of Graham Land. First charted and named "Baie Thomson" by the French Antarctic Expedition under Charcot, 1903-05, for Gaston-Arnold-Marie Thomson (1848-1932), French politician who was Minister of the Navy in 1905.

Thomson Glacier
Thomson Glacier (-73.45°N, -80.21667°W) is a glacier about 8 nautical miles (15 km) long on Bryan Coast flowing between Rydberg and Wirth Peninsulas into Fladerer Bay. Named by Advisory Committee on Antarctic Names (US-ACAN) after Janet W. Thomson, British Antarctic Survey, head of the mapping operations from the 1980s to 2002, and member of the USA-UK cooperative project to compile Glaciological and Coastal-Change Maps of the Antarctic Peninsula.

Thomson Head
Thomson Head (-67.58333°N, -66.76667°W) is a steep, rocky headland rising to 915 m at the east side of Bourgeois Fjord, between Perutz and Bader Glaciers on the west coast of Graham Land. First surveyed in 1936 by the British Graham Land Expedition (BGLE) under Rymill. Resurveyed in 1948-49 by the Falkland Islands Dependencies Survey (FIDS) and named for William H. Thomson, FIDS air pilot at Stonington Island in 1947.

Thomson Massif
Thomson Massif (-70.58333°N, 66.8°W) is a rock massif in the Aramis Range, Prince Charles Mountains, from which rise Mount Sundberg and Mount McGregor. Plotted from ANARE (Australian National Antarctic Research Expeditions) air photos taken in 1956 and 1960. Named by Antarctic Names Committee of Australia (ANCA) for R.B. Thomson, officer in charge at Wilkes Station in 1962.

Thomson Peak
Thomson Peak (-71.98333°N, 166.11667°W) is a peak (2,350 m) situated 11 nautical miles (20 km) southeast of Mount Shute at the extreme south limit of Mirabito Range. Named by the northern party of New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1963-64, for Robert B. Thomson of New Zealand, scientific leader at Hallett Station, 1960; officer-in-charge at Wilkes Station, 1962; deputy leader at Scott base, 1963-64.

Thomson Point
Thomson Point (-60.71667°N, -44.63333°W) is a point on the east side of Pirie Peninsula, 1.7 nautical miles (3.1 km) southeast of Cape Mabel, on the north coast of Laurie Island in the South Orkney Islands. Charted in 1903 by the Scottish National Antarctic Expedition under Bruce, who named it for J.A. (later Sir Arthur) Thomson, regius professor of natural history, University of Aberdeen, Scotland.

Thomson Rock
Thomson Rock (-71.45°N, -66.93333°W) is a rock nunatak along the east margin of Batterbee Mountains, 3 nautical miles (6 km) east of Mount Bagshawe in Palmer Land. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) for Michael R.A. Thomson, British Antarctic Survey (BAS) geologist at Fossil Bluff and Stonington Island stations, 1963-66.

Thomson Summit
Thomson Summit (-75.26667°N, -72.43333°W) is a mostly snow-covered mountain rising to 1,515 m between Mount Goodman and Mount Chandler in the Behrendt Mountains, Ellsworth Land. These mountains were visited during the 1984-85 season by a United States Antarctic Research Program (USARP) geological party led by Peter D. Rowley of the U.S. Geological Survey. Upon his suggestion, named by Advisory Committee on Antarctic Names (US-ACAN), 1986, after Janet Wendy Thomson, British Antarctic Survey (BAS) geologist; British Exchange Scientist with the Rowley party who climbed to the summit of this mountain; from 1992, Head, Mapping and Geographic Information Centre, BAS.

Thor Island
Thor Island (-64.55°N, -62°W) is the largest of a group of small islands lying at the east side of Foyn Harbor in Wilhelmina Bay, off the west coast of Graham Land. The island was named South Thor Island by whalers in 1921-22 because the whaling factory Thor I was moored to it during that season (the island to the northeast was called North Thor Island). In 1960 the United Kingdom Antarctic Place-Names Committee (UK-APC) limited the name Thor to the island actually used by the ship; the other island was left unnamed. == See also == * List of antarctic and sub-antarctic islands

Mount Thor
Mount Thor (-77.58333°N, 160.68333°W) is a prominent peak, about 2,000 m, standing south of the Labyrinth in the Asgard Range of Victoria Land. Named by the Victoria University of Wellington Antarctic Expedition (VUWAE) (1958-59) for one of the Norse gods.

Mount Thorarinsson
Mount Thorarinsson (-67.25°N, -64.98333°W) is a peak at the south side of the terminus of Hess Glacier on the east coast of Graham Land. The feature forms a point on the rocky spur that descends from the plateau, and is one of the most distinctive features along the coast as viewed from the Larsen Ice Shelf. This coastal area was photographed by several American expeditions: United States Antarctic Service (USAS), 1939-41; Ronne Antarctic Research Expedition (RARE), 1947-48; U.S. Navy photos, 1968. Mapped by Falkland Islands Dependencies Survey (FIDS), 1947-48. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) for Sigurdur Thorarinsson, Icelandic glaciologist.

Thoreson Peak
Thoreson Peak (-77.73333°N, 163.63333°W) is an one of the highest peaks (1200 m) on the rock bluffs at the south side of New Harbor on Scott Coast, Victoria Land. The peak is 3.2 nautical miles (6 km) west-southwest of Stewart Peak. Named by Advisory Committee on Antarctic Names (US-ACAN) (2000) after Ronald D. Thoreson, biology laboratory manager with the winter party at McMurdo Station, 1970.

Thorfinn Islands
Thorfinn Islands (-67.35°N, 60.9°W) is a group of small islands lying about 5 nautical miles (9 km) off the coast of Mac. Robertson Land between Campbell Head and Cape Simpson. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition, 1936-37, and named by them, apparently after the Norwegian whale catcher Thorfinn. == See also == * List of antarctic and sub-antarctic islands

Thorgaut Island
Thorgaut Island (-67.45°N, 63.55°W) is the largest island in the northeast part of the Robinson Group, lying 7 nautical miles (13 km) northwest of Cape Daly. This island and those near it were sighted in 1931 by the crew of the Norwegian whale catcher names Thorgaut and Robinson, respectively, for the group. Having approved Robinson as the group name, Thorgaut Island has been approved for the most conspicuous of its features. == See also == * List of antarctic and sub-antarctic islands

Thorne Point
Thorne Point (-66.95°N, -67.2°W) is a point at the west side of Langmuir Cove, marking the northwest extremity of Arrowsmith Peninsula, Graham Land. Mapped in 1960 from surveys by Falkland Islands Dependencies Survey (FIDS). Named for John Thorne, FIDS meteorologist at Detaille Island in 1956 and 1957.

Mount Thorne
Mount Thorne (-85.68333°N, -158.66667°W) is a prominent peak, 1,465 m, rising on the east flank of Amundsen Glacier, 6 nautical miles (11 km) northwest of Mount Goodale, in the Hays Mountains of the Queen Maud Mountains. Discovered in December 1929 by the Byrd Antarctic Expedition geological party under Laurence Gould, and named for George A. Thorne, topographer and dog driver with that party.

Mount Thornton
Mount Thornton (-73.56667°N, -77.11667°W) is a mountain between Mount McCann and Mount Benkert in the east-central part of the Snow Nunataks, Ellsworth Land. Discovered and photographed by the United States Antarctic Service (USAS) 1939-41. Named by Advisory Committee on Antarctic Names (US-ACAN) for Captain Richard Thornton, commander of USNS Eltanin on Antarctic cruises, 1967-68.

Thorp Ridges
Thorp Ridges (-66.56667°N, 52.85°W) is a three almost parallel ridges standing 18 nautical miles (33 km) west of Stor Hanakken Mountain in Enderby Land. Plotted from air photos taken from ANARE (Australian National Antarctic Research Expeditions) aircraft in 1956. Named by Antarctic Names Committee of Australia (ANCA) for A. Thorp, electrical fitter at Wilkes Station in 1961.

Mount Thrace
Mount Thrace (-77.5°N, 161.11667°W) is a peak rising to 1800 m at the southeast side of Mount Boreas, Olympus Range, in the McMurdo Dry Valleys. The peak is connected by a ridge to the Mount Boreas massif. In association with the names of figures in Greek mythology grouped in the range, named by Advisory Committee on Antarctic Names (US-ACAN) (2004) after Thrace, legendary home of Boreas (Mount Boreas, q.v.).

Three Brothers
Three Brothers (-54.26667°N, -36.8°W) is a three mountain peaks aligned in a north-south direction, situated 4 nautical miles (7 km) west of the head of Cumberland West Bay in the central part of South Georgia. The origin of the name which dates back to the 1930s is not certain.

Three Brothers Hill
Three Brothers Hill (-62.25°N, -58.68333°W) is a conspicuous hill, 210 m, which is the remnant neck of an extinct volcano situated at the east side of Potter Cove, King George Island, in the South Shetland Islands. The name was used by Scottish geologist David Ferguson in a 1921 report based upon his investigations of King George Island in 1913-14, but may reflect an earlier naming by whalers. The name may be suggestive of the appearance of the feature which consists of two higher summits and one which is lower.

Three Lakes Valley
Three Lakes Valley (-60.7°N, -45.61667°W) is a low valley containing three freshwater lakes, extending from the vicinity of Elephant Flats northward to Stygian Cove on Signy Island, in the South Orkney Islands. Surveyed and given this descriptive name by the Falkland Islands Dependencies Survey (FIDS) in 1947.

Three Little Pigs
Three Little Pigs (-65.23333°N, -64.28333°W) is a three small islands 0.3 nautical miles (0.6 km) northwest of Winter Island in the Argentine Islands, Wilhelm Archipelago. Charted and named in 1935 by the British Graham Land Expedition (BGLE) under Rymill.

Three Nunataks
Three Nunataks (-80.06667°N, 154.83333°W) is a three nunataks, largely ice covered, lying 2 nautical miles (3.7 km) southwest of Haven Mountain at the northwest edge of the Britannia Range. Named by the Darwin Glacier Party of the Commonwealth Trans-Antarctic Expedition, 1956-58.

Three Sails
Three Sails (-80.45°N, -80.7°W) is a three small isolated nunataks in a row, located 6 nautical miles (11 km) east of Redpath Peaks at the south extremity of the Heritage Range, Ellsworth Mountains. The descriptive name was applied by the University of Minnesota Geological Party to the area, 1963-64.

Three Sisters Cones
Three Sisters Cones (-77.56667°N, 166.96667°W) is a three aligned cones at an elevation of about 1,800 m on the southwest slopes of Mount Erebus on Ross Island. Named by members of the British Antarctic Expedition, 1910-13, under Scott.

Three Sisters Point
Three Sisters Point (-62.06667°N, -57.88333°W) is a point marked by three conspicuous boulders, forming the west side of the entrance to Sherratt Bay on the south coast of King George Island, in the South Shetland Islands. Charted and named during 1937 by DI personnel on the Discovery II.

Three Slice Nunatak
Three Slice Nunatak (-68.03333°N, -64.95°W) is a conspicuous nunatak rising to 500 m, surmounting the low, ice-covered northeast extremity of Joerg Peninsula on the east coast of Graham Land. This distinctive landmark, in the form of a serrated ridge 1.5 nautical miles (2.8 km) long, is snow covered, except for the three almost vertical rock faces which suggest its name. Discovered and named by members of East Base of the United States Antarctic Service (USAS) who surveyed this area on land and from the air in 1940.

Threshold Nunatak
Threshold Nunatak (-83.76667°N, 166.1°W) is an isolated nunatak located at the mouth of Tillite Glacier, 5 nautical miles (9 km) northeast of Portal Rock, in Queen Alexandra Range. The name was suggested by John Gunner of the Ohio State University Geological Expedition, 1969-70, who was landed by helicopter to collect a rock sample here. The name is in association with Portal Rock and also reflects the location at the mouth of Tillite Glacier.

Thrinaxodon Col
Thrinaxodon Col (-85.2°N, -174.31667°W) is a rock col 2 nautical miles (3.7 km) southeast of Rougier Hill. The col is along the ridge that trends southward from Rougier Hill in the Cumulus Hills, Queen Maud Mountains. The name was proposed to Advisory Committee on Antarctic Names (US-ACAN) in 1971 by geologist David H. Elliot of the Ohio State University Institute of Polar Studies. The col is a very important fossil (vertebrate) locality at which several specimens of the mammal-like reptile Thrinaxodon were found.

Thule Island
Thule Island (-59.45°N, -27.31667°W) is a westernmost island of Southern Thule, a group of three small islands at the south end of the South Sandwich Islands. Southern Thule was discovered and named by Captain James Cook in 1775. Thule Island was named by Admiral Thaddeus Bellingshausen who made an accurate sketch of these islands in 1820. == See also == * List of antarctic and sub-antarctic islands

Thule Islands
Thule Islands (-60.7°N, -45.61667°W) is a group of small islands and rocks lying 0.25 nautical miles (0.5 km) southwest of Balin Point in the northwest part of Borge Bay, Signy Island, in the South Orkney Islands. The name Thule Rocks was used as early as 1916, and appears to refer at least in part to this group. The whales at sea, belonged to the Thule Whaling Co. of Oslo. It operated in the South Orkney Islands in 1912-13 and 1913-14 and anchored on the east side of Signy Island during January 1913. The altered form of the name was recommended by the United Kingdom Antarctic Place-Names Committee (UK-APC) following a survey by the Falkland Islands Dependencies Survey (FIDS) in 1947. == See also == * List of antarctic and sub-antarctic islands

Thulla Cove
Thulla Cove (-60.7°N, -45.65°W) is a cove lying south of Thulla Point on the west side of Signy Island in the South Orkney Islands. Named in 1990 by the United Kingdom Antarctic Place-Names Committee (UK-APC) in association with the point.

Thulla Point
Thulla Point (-60.71667°N, -45.66667°W) is an ice-free point lying 1 nautical mile (1.9 km) northeast of Jebsen Point on the west coast of Signy Island, in the South Orkney Islands. Roughly surveyed in 1933 by DI personnel, and surveyed in 1947 by the Falkland Islands Dependencies Survey (FIDS). Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1954 for the Norwegian steamship Thulla, which searched for suitable anchorages for whale factory ships in the South Orkney Islands in 1911-12.

Thuma Peak
Thuma Peak (-69.66667°N, -72.05°W) is a mainly ice-free peak in the Desko Mountains, rising 2 nautical miles (3.7 km) northwest of Overton Peak in southeast Rothschild Island. Named by Advisory Committee on Antarctic Names (US-ACAN) for Captain Jack S. Thuma, USCG, Commanding Officer, USCGC parallel track method of breaking ice in McMurdo Sound, supporting resupply of the U.S. McMurdo Station on Ross Island.

Thumb Point
Thumb Point (-75.96667°N, 160.46667°W) is a rock spur extending from the northwest side of The Mitten, a butte in the Prince Albert Mountains, Victoria Land. Named by the Southern Party of New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1962-63, because the feature resembles the thumb on a mitten.

Thumb Promontory
Thumb Promontory (-84.8°N, -116.3°W) is a prominent rock spur on the north side of Lackey Ridge, Ohio Range. Thumb Promontory was unofficially named by a New Zealand Antarctic Research Program (NZARP) field party to the Ohio Range, 1979-80. The name was formally proposed by geologist Margaret Bradshaw, member of a second NZARP field party, 1983-84. So named because of the similarity of the upper part of this feature to an upturned thumb from certain angles.

Thumb Rock
Thumb Rock (-65.25°N, -64.26667°W) is a rock lying between Winter Island and the northwest end of Galindez Island in the Argentine Islands, Wilhelm Archipelago. Charted and named in 1935 by the British Graham Land Expedition (BGLE) under Rymill.

Thunder Glacier
Thunder Glacier (-64.83333°N, -63.4°W) is a through glacier, 4 nautical miles (7 km) long, which extends in an east-west direction across Wiencke Island between Sierra DuFief and the Wall Range, in the Palmer Archipelago. Probably known since the discovery of Wiencke Island by the Belgian Antarctic Expedition in 1898. Charted in 1944 by the Falkland Islands Dependencies Survey (FIDS), and so named by them because a survey party was nearly overwhelmed there by an avalanche.

Mount Thundergut
Mount Thundergut (-77.65°N, 161.4°W) is a rock peak 3 nautical miles (6 km) northeast of St. Pauls Mountain in the Asgard Range, Victoria Land. The descriptive name was given by New Zealand Antarctic Place-Names Committee (NZ-APC); when viewed from the east, the peak presents a very steep domed face with a vertical gut subject to rockfall.

Mount Thurman
Mount Thurman (-84.7°N, -170.85°W) is the highest summit (780 m) in Bravo Hills along the edge of Ross Ice Shelf, located between the mouths of Gough and Le Couteur Glaciers. Named by Advisory Committee on Antarctic Names (US-ACAN) for Commander Robert K. Thurman, U.S. Navy, Assistant Chief of Staff for Operations, U.S. Naval Support Force, Antarctica, 1963.

Thuronyi Bluff
Thuronyi Bluff (-66.8°N, -64.75°W) is a prominent bluff at the head of Mill Inlet between Balch Glacier and Gould Glacier, on the Foyn Coast, Graham Land. The bluff was photographed from the air by Ronne Antarctic Research Expedition (RARE) and surveyed by Falkland Islands Dependencies Survey (FIDS) in 1947. Named by Advisory Committee on Antarctic Names (US-ACAN) after Geza T. Thuronyi, Antarctic bibliographer, Library of Congress, 1967-90; Head, Cold Regions Bibliography Project and Editor, volumes 3-18, Antarctic Bibliography, compiled in the Science and Technology Division, Library of Congress, Washington, DC; member of US-ACAN between 1987-90.

Thurston Glacier
Thurston Glacier (-73.3°N, -125.3°W) is a glacier about 15 nautical miles (28 km) long which drains the southeast slopes of Mount Siple on Siple Island. The glacier trends eastward and then east-northeastward to reach the north shore of the island. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy aerial photography, 1959-65. Named by Advisory Committee on Antarctic Names (US-ACAN) for Thomas R. Thurston, United States Antarctic Research Program (USARP) meteorologist at Byrd Station in 1965.

Thurston Island
Thurston Island (-72.1°N, -99°W) is a largely ice-covered, glacially dissected island, 135 nautical miles (250 km) long and 55 nautical miles (100 km) wide, lying between Amundsen and Bellingshausen Seas off the northwest end of Ellsworth Land. The island is separated from the mainland by peacock Sound, which is occupied by the west portion of Abbot Ice Shelf Discovered by R. Admiral Byrd and members of the United States Antarctic Service (USAS) in a flight from the Bear, February 27, 1940. Named by Byrd for W. Harris Thurston, New York textile manufacturer, designer of the windproof "Byrd Cloth" and contributor to the expedition. Originally charted as a peninsula, the feature was found to be an island by the U.S. Navy Bellingshausen Sea Expedition in February 1960. == See also == * List of antarctic and sub-antarctic islands

Thwaites Glacier
Thwaites Glacier (-75.5°N, -106.75°W) is a broad glacier flowing into Amundsen Sea about 30 nautical miles (60 km) east of Mount Murphy, Marie Byrd Land. Though imperfectly delineated, the glacier has tremendous flow and in January 1966 had formed a large floating glacier tongue (40 nautical miles (70 km) long) and an extensive grounded iceberg tongue (70 nautical miles (130 km) long). Together, these features extend into Amundsen Sea more than 100 nautical miles (180 km) and inhibit east-west navigation by ships. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1959-66. Named by Advisory Committee on Antarctic Names (US-ACAN) in association with Thwaites Glacier Tongue.

Thwaites Glacier Tongue
Thwaites Glacier Tongue (-75°N, -106.83333°W) is a glacier tongue, about 20 nautical miles (37 km) wide and 40 nautical miles (70 km) long, which is the seaward extension of Thwaites Glacier into the Amundsen Sea. It enters the sea about 30 nautical miles (60 km) east of Mount Murphy in Marie Byrd Land. Delineated from aerial photographs taken by U.S. Navy Operation Highjump in January 1947. Named by Advisory Committee on Antarctic Names (US-ACAN) for Fredrik T. Thwaites, glacial geologist, geomorphologist and professor emeritus at the University of Wisconsin.

Thwaites Iceberg Tongue
Thwaites Iceberg Tongue (-74°N, -108.5°W) is a very large and rather compact iceberg tongue which is aground and lies in the Amundsen Sea, about 20 nautical miles (37 km) northeast of Bear Peninsula, Marie Byrd Land. The feature is about 70 nautical miles (130 km) long and 20 nautical miles (37 km) wide and in January 1966 its south end was only 3 nautical miles (6 km) north of Thwaites Glacier Tongue, from whence it had broken off. Delineated by United States Geological Survey (USGS) from aerial photographs taken by U.S. Navy Operation Highjump, 1946-47, and U.S. Navy Operation Deepfreeze, 1959-66. Named by Advisory Committee on Antarctic Names (US-ACAN) in association with Thwaites Glacier and Thwaites Glacier Tongue.

Thyasira Hill
Thyasira Hill (-64.36667°N, -57°W) is a distinctive hill within a group of small hills rising to about 60 m, 250-300 m south of Nordenskjold's hut on Spath Peninsula, Snow Hill Island. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) in 1995 because of the abundance of the fossil bivalue mollusk Thyasira townsendi found in this area.

Thyer Glacier
Thyer Glacier (-67.71667°N, 48.75°W) is a tributary glacier, flowing northwest along the south side of the Raggatt Mountains to enter the Rayner Glacier. Mapped from ANARE (Australian National Antarctic Research Expeditions) air photos taken by the RAAF flight in 1956. Named by Antarctic Names Committee of Australia (ANCA) for R.F. Thyer, Chief Geophysicist, Bureau of Mineral Resources, Australian Dept. of National Development.

Tiber Rocks
Tiber Rocks (-68.38333°N, -67°W) is a group of rocks lying near the head of Rymill Bay, close west of the mouth of Romulus Glacier and 3 nautical miles (6 km) northwest of the highest summit of Black Thumb, off the west coast of Graham Land. First seen and roughly surveyed in 1936 by the British Graham Land Expedition (BGLE) under Rymill. Resurveyed in 1948-49 by the Falkland Islands Dependencies Survey (FIDS), and so named by them because of the association of these rocks with nearby Romulus and Remus Glaciers.

Tickell Head
Tickell Head (-60.53333°N, -45.8°W) is a headland forming the east side of Bridger Bay on the north coast of Coronation Island, in the South Orkney Islands. First seen in December 1821 in the course of the joint cruise by Captain Nathaniel Palmer, American sealer, and Captain George Powell, British sealer. Surveyed by the Falkland Islands Dependencies Survey (FIDS) in 1956-58 and named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1959 for William L.N. Tickell, FIDS meteorologist at Signy Island in 1955 and leader at that station in 1956.

Tickle Channel
Tickle Channel (-67.1°N, -67.71667°W) is a narrow channel in the south part of Hanusse Bay, from 1 to 3 nautical miles (6 km) wide and 5 nautical miles (9 km) long, extending northward from The Gullet and separating Hansen Island from the east extremity of Adelaide Island. First seen from the air by the British Graham Land Expedition (BGLE) on a flight in February 1936. Surveyed from the ground in 1948 by the Falkland Islands Dependencies Survey (FIDS), who applied this descriptive name. In Newfoundland and Labrador a tickle is a narrow water passage as between two islands.

Mount Tidd
Mount Tidd (-81.28333°N, -85.21667°W) is a prominent rock peak which is the highest summit in Pirrit Hills. The peak was positioned by the U.S. Ellsworth-Byrd Traverse Party on December 10, 1958. Named by Advisory Committee on Antarctic Names (US-ACAN) for Lieutenant Paul Tidd, U.S. Navy, Officer-in-Charge of Ellsworth Station in 1958.

Tierney Peninsula
Tierney Peninsula (-72.38333°N, -95.76667°W) is an ice-covered peninsula about 14 nautical miles (26 km) long, between Savage Glacier and Morgan Inlet in the east end of Thurston Island. Discovered on helicopter flights from the USS Burton Island and Glacier of the U.S. Navy Bellingshausen Sea Expedition in February 1960. Named by Advisory Committee on Antarctic Names (US-ACAN) for J.Q. Tierney, oceanographer aboard the Burton Island on this expedition.

Tiger Island
Tiger Island (-76.78333°N, 162.46667°W) is an island 4 nautical miles (7 km) north of Lion Island on the north side of Granite Harbor, Victoria Land. The New Zealand Northern Survey Party of the Commonwealth Trans-Antarctic Expedition (1956-58) established a survey station on its highest point in October 1957. They named it in analogy with nearby Lion Island. == See also == * List of antarctic and sub-antarctic islands

Tiger Peak
Tiger Peak (-70.86667°N, 165.96667°W) is a peak, 1,490 m, standing above the cirque wall near the head of Ludvig Glacier in the central Anare Mountains. The feature is distinguished by stripes of different colored rock; hence the name, applied by the ANARE (Australian National Antarctic Research Expeditions) (Thala Dan), 1962, which explored this area.

Tiger Rocks
Tiger Rocks (-53.98333°N, -38.26667°W) is a two rocks, the higher of which rises 23 m above sea level, located 1. 5 nautical miles (9 km) west of Main Island in the Willis Islands, South Georgia. The descriptive name was applied during the surveys from HMS Owen in 1960-61.

Tigerstripe Ridge
Tigerstripe Ridge (-76.7°N, 161.5°W) is the north ridge of Flagship Mountain, notable for the alternating stripes of rock and snow which extend over much of its length, in the Convoy Range, Victoria Land. Descriptively named from the tigerlike stripes by a 1989-90 New Zealand Antarctic Research Program (NZARP) field party.

Tighe Rock
Tighe Rock (-74.43333°N, -100.06667°W) is a rock outcropping along the coastal slope at the west margin of the Hudson Mountains, located 15 nautical miles (28 km) northwest of Mount Moses. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1960-66. Named by Advisory Committee on Antarctic Names (US-ACAN) for Robert F. Tighe, electrical engineer at Byrd Station, 1964-65.

Tijuca Point
Tijuca Point (-54.33333°N, -36.21667°W) is a prominent rock point forming the northwest side of the entrance to Hound Bay on the north coast of South Georgia. The name Penguin Point was probably applied to this feature by DI personnel who made a running survey of this coast in 1930. Following the SGS, 1951-52, it was recommended that this name be altered to avoid confusion with the many other "Penguin" names. The name Tijuca Point was given by the United Kingdom Antarctic Place-Names Committee (UK-APC) for the Tijuca, a three-masted barque built at Nantes in 1866. From 1908 onwards, she was used as a transport vessel by the Compania Argentina de Pesca, lying between Buenos Aires and the whaling station at Grytviken. She foundered in 1946.

Tilbrook Hill
Tilbrook Hill (-60.73333°N, -45.6°W) is a hill rising to 70 m between Hillier Moss and Caloplaca Cove in southeast Signy Island, South Orkney Islands. Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1990 after Peter J. Tilbrook, British Antarctic Survey (BAS) terrestrial biologist, 1961-75 (latterly Head, Terrestrial Biology Section), who initiated two long-term research sites close to this feature.

Tilbrook Point
Tilbrook Point (-59.43333°N, -27.25°W) is a conspicuous cliffs forming the northwest point of Cook Island, South Sandwich Islands. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) for Peter J. Tilbrook, zoologist of the survey of the South Sandwich Islands from HMS Protector in 1964.

Tillberg Peak
Tillberg Peak (-64.76667°N, -60.9°W) is a largely ice-free peak, 610 m, on the ridge running east from Foster Plateau toward Sentinel Nunatak, on the east coast of Graham Land. The name Tillberg was given to a group of four rocky outcrops in this area but, since they are not conspicuous topographically, the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1963 recommended that the name be transferred to this more useful landmark. Named by Dr. Otto Nordenskjold after Judge Knut Tillberg, contributor to the Swedish Antarctic Expedition, 1901-04.

Tillergone Slope
Tillergone Slope (-76.73333°N, 161.4°W) is a glacial slope, 1.2 nautical miles (2.2 km) wide, which is a distributary of Flight Deck Neve between Dotson Ridge and Flagship Mountain, in Convoy Range, Victoria Land. The name was applied by a New Zealand Antarctic Research Program (NZARP) field party to commemorate an incident when the steering gear of a motor toboggan broke during the 1989-90 season. At the time, this glacier was being used as access to a camp at Flagship Mountain, and the slope had to be negotiated twice without steerage.

Tillett Islands
Tillett Islands (-67.18333°N, 59.45°W) is a group of small, somewhat dispersed islands, the largest rising 70 m above the sea, lying 5 nautical miles (9 km) northeast of Cape Wilkins. Discovered and named in February 1936 by DI personnel on the William Scoresby. == See also == * List of antarctic and sub-antarctic islands

Tilley Bay
Tilley Bay (-67.4°N, 60.06667°W) is a bay just east of Tilley Nunatak on the coast of Mac. Robertson Land. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition, 1936-37, and named Nabbvika (peg bay). Renamed by Antarctic Names Committee of Australia (ANCA) because of its proximity to Tilley Nunatak.

Tilley Nunatak
Tilley Nunatak (-67.4°N, 60.05°W) is a bold, rocky outcrop 5 nautical miles (9 km) south of Hobbs Islands, projecting from the coastal ice cliffs eastward of William Scoresby Bay. Discovered in February 1936 by DI personnel on the William Scoresby and named by them for Professor C.E. Tilley, who studied the rock specimens brought back by the expedition.

Mount Tilley
Mount Tilley (-69.75°N, -69.48333°W) is a flat-topped, ice-capped mountain, 1,900 m, 7 nautical miles (13 km) south of Mount Tyrrell and 3 nautical miles (6 km) inland from George VI Sound in the east part of Alexander Island. Despite its height, it is best described as a foothill of the Douglas Range, from which it is separated by Toynbee Glacier. First photographed from the air in 1936 by the British Graham Land Expedition (BGLE). Surveyed in 1948 by the Falkland Islands Dependencies Survey (FIDS) and named by them for Cecil E. Tilley, professor of mineralogy and petrology at Cambridge University.

Tillite Glacier
Tillite Glacier (-83.85°N, 166°W) is a tributary glacier flowing northwest from Pagoda Peak in Queen Alexandra Range to join Lennox-King Glacier north of Fairchild Peak. So named by New Zealand Geological Survey Antarctic Expedition (NZGSAE) (1961-62) because it contains outcrops of ancient moraine (tillite), indicative of glacial action in remote Paleozoic times.

Tillite Spur
Tillite Spur (-85.98333°N, -126.6°W) is a narrow, steep-cliffed rock spur, 3 nautical miles (6 km) long, descending from southern Wisconsin Plateau between Red Spur and Polygon Spur and terminating at the east side of Olentangy Glacier. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1960-64. The name was proposed by John H. Mercer, United States Antarctic Research Program (USARP) geologist to this area in 1964-65, because tillite extends the length of the spur above its granitic cliffs.

Tilman Ridge
Tilman Ridge (-76.66667°N, 159.58333°W) is a ridge forming the northwestern arm of the Allan Hills, in Victoria Land. Reconnoitered by the New Zealand Antarctic Research Program (NZARP) Allan Hills Expedition (1964) who gave the name after W.H. Tilman, a mountaineering associate of Shipton and Odell, after whom the nearby Shipton Ridge and Odell Glacier are named.

Tilt Rock
Tilt Rock (-70.45°N, -68.73333°W) is an isolated rock peak, 670 m, situated 2 nautical miles (3.7 km) inland from the ice shelf of George VI Sound and 2 nautical miles (3.7 km) northeast of Block Mountain in eastern Alexander Island. First photographed from the air on November 23, 1935, by Lincoln Ellsworth and later mapped from these photos by W.L.G. Joerg. Roughly surveyed from the ground in 1936 by the British Graham Land Expedition (BGLE) and resurveyed in 1948-49 by the Falkland Islands Dependencies Survey (FIDS). So named by FIDS because of its tilted appearance.

Timber Peak
Timber Peak (-74.16667°N, 162.38333°W) is the high peak (3,070 m) above Priestley Glacier, on the south side. The peak is 2 nautical miles (3.7 km) west-northwest of the summit of Mount New Zealand in the Eisenhower Range, Victoria Land. The Southern Party of the New Zealand Geological Survey Antarctic Expedition (NZGSAE) (1962-63) gave this name because petrified sections of tree branches were found in sandstone deposits at this point.

Cape Timberlake
Cape Timberlake (-78.96667°N, 161.61667°W) is a bold cape at the west side of the mouth of Skelton Glacier. Named by Advisory Committee on Antarctic Names (US-ACAN) in 1964 for Lieutenant Commander Lewis G. Timberlake, U.S. Navy, public works officer at McMurdo Station, 1962.

Cape Timblon
Cape Timblon (-62.7°N, -61.31667°W) is a conspicuous rocky cape forming the north extremity of Snow Island in the South Shetland Islands. The cape is probably named for Carlos Timblon, Master of the Argentine sealer San Juan Nepomuceno which was the first vessel known to have taken fur seals in the South Shetland Islands, in 1819-20.

Mount Timosthenes
Mount Timosthenes (-69.13333°N, -65.95°W) is a prominent peak between the head of Hariot Glacier and the north side of Airy Glacier, 3 nautical miles (6 km) northwest of Peregrinus Peak, in central Antarctic Peninsula. Photographed from the air by United States Antarctic Service (USAS), September 28, 1940, and by Ronne Antarctic Research Expedition (RARE), November 27, 1947. Surveyed by Falkland Islands Dependencies Survey (FIDS) in December 1958. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) after Aristotle Timosthenes of Rhodes, chief pilot of King Ptolemy II (285-246 B.C.), who wrote sailing directions and devised the windrose of 8 or 12 winds, later developed into the points of the compass.

Tindal Bluff
Tindal Bluff (-67.06667°N, -64.86667°W) is a rocky headland rising to 800 m between the terminus of Fricker Glacier and Monnier Point on the east coast of Graham Land. This coastal area was photographed by several American expeditions: United States Antarctic Service (USAS), 1939-41; Ronne Antarctic Research Expedition (RARE), 1947-48; U.S. Navy photos, 1968. Mapped by Falkland Islands Dependencies Survey (FIDS), 1947-48. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) for Ronald Tindal, General Assistant with the British Antarctic Survey (BAS) Larsen Ice Shelf party in 1963-64.

Tindegga Ridge
Tindegga Ridge (-72.51667°N, -2.9°W) is a rock ridge immediately southwest of Ytstenut Peak, at the northeast end of the Borg Massif in Queen Maud Land. Mapped by Norwegian cartographers from surveys and air photos by Norwegian-British-Swedish Antarctic Expedition (NBSAE) (1949-52) and air photos by the Norwegian expedition (1958-59) and named Tindegga (the summit ridge).

Tindeklypa
Tindeklypa (-72.08333°N, -2.36667°W) is a double summit separated by a deep ravine. The feature is located 1 nautical mile (1.9 km) north of Istind Peak, on the east side of Ahlmann Ridge in Queen Maud Land. Photographed from the air by the German Antarctic Expedition (1938-39). Mapped by Norwegian cartographers from surveys and air photos by Norwegian-British-Swedish Antarctic Expedition (NBSAE) (1949-52) and air photos by the Norwegian expedition (1958-59) and named Tindeklypa (the summit ravine).

Tindley Peaks
Tindley Peaks (-71.3°N, -67.43333°W) is a group of peaks rising to about 760 m between Christie Peaks and McArthur Glacier in the Batterbee Mountains, on the Rymill Coast, Palmer Land. Named in 1977 by the United Kingdom Antarctic Place-Names Committee (UK-APC) for Roger C. Tindley, British Antarctic Survey (BAS) general assistant and mechanic at Fossil Bluff, 1973-75.

Tingey Rocks
Tingey Rocks (-69.95°N, 67.86667°W) is a two small rock features located southwest of Single Island on the west edge of the Amery Ice Shelf. Discovered by the ANARE (Australian National Antarctic Research Expeditions) Prince Charles Mountains survey party in 1971. Named by Antarctic Names Committee of Australia (ANCA) for R.J. Tingey, geologist with the party.

Tinglof Peninsula
Tinglof Peninsula (-72.03333°N, -100.1°W) is an ice-covered peninsula, 10 nautical miles (18 km) long, between Henry and Wagoner Inlets on the north side of Thurston Island. Delineated from aerial photographs taken by U.S. Navy Operation Highjump in December 1946. Named by Advisory Committee on Antarctic Names (US-ACAN) for Ivor Tinglof, tractor mechanic of the Byrd Antarctic Expedition in 1933-35, who built at Little America the first heavy cargo sleds for use in the Antarctic.

Tinker Glacier
Tinker Glacier (-74°N, 164.83333°W) is a glacier, 25 nautical miles (46 km) long, draining the central part of the Southern Cross Mountains and flowing southeast into Wood Bay, on the coast of Victoria Land. Named by the Northern Party of the New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1962-63, for Lieutenant Colonel Ron Tinker, leader at Scott Base during that season.

Tinker Glacier Tongue
Tinker Glacier Tongue (-74.1°N, 165.03333°W) is the seaward extension of the Tinker Glacier, projecting into the northwest corner of Wood Bay on the coast of Victoria Land. The name was suggested by Advisory Committee on Antarctic Names (US-ACAN) in association with Tinker Glacier.

Tinsel Dome
Tinsel Dome (-63.73333°N, -58.91667°W) is a small ice-covered hill, 700 m, standing between Aureole Hills and Bone Bay on Trinity Peninsula. Charted in 1948 by the Falkland Islands Dependencies Survey (FIDS) who gave this descriptive name.

Tioga Hill
Tioga Hill (-60.73333°N, -45.65°W) is a rounded summit, 290 m, standing at the west side the head of McLeod Glacier on Signy Island, in the South Orkney Islands. The hill is the highest point on the island. Surveyed in 1947 by the Falkland Islands Dependencies Survey (FIDS). Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1954 for the Tioga, owned by Messrs. Christensen and Co. (Corral, Chile), which was one of the first floating factories to flense whales at sea. It was wrecked at nearby Port Jebsen during a gale on February 4, 1913.

Tioga Lake
Tioga Lake (-60.7°N, -45.65°W) is a small lake north-northeast of Port Jebsen and northwest of Tioga Hill, from which it takes its name, on Signy Island, South Orkney Islands. Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1981.

Tisobis Valley
Tisobis Valley (-80.18333°N, 156.33333°W) is an ice-free valley just northeast of Mount Henderson in Britannia Range. Named in association with Britannia by a University of Waikato (N.Z.) geological party, 1978-79, led by M.J. Selby. Tisobis is a historical name used in Roman Britain for the Dwyryd River.

Titan Dome
Titan Dome (-88.5°N, 165°W) is a large ice dome on the polar plateau, trending east-west and rising to 3,100 m between Queen Maud Mountains and the South Pole. The dome was first crossed by the sledge parties of Shackleton, Amundsen, and Scott on their journeys toward the South Pole, and was described as a major snow ridge. It was delineated by the Scott Polar Research Institute (SPRI)-NFS-Technical University of Denmark (TUD) airborne radio echo sounding program, 1967-79, and named after the Cambridge University (U.K.) Titan computer, which was used to process all the early radio echo sounding data for this part of Antarctica.

Titan Nunatak
Titan Nunatak (-72.15°N, -68.71667°W) is a broad, rather flat-topped nunatak, 460 m, standing between Coal Nunatak and Tethys Nunataks in the southeast corner of Alexander Island. First seen and photographed from the air by Lincoln Ellsworth on November 23, 1935, and mapped from photos obtained on that flight by W.L.G. Joerg. Observed from the northwest (the direction from which Ellsworth photographed this nunatak), only the summit protrudes above the coastal ice, and it was uncertain whether this was a Peak on Alexander Island or an island in George VI Sound. Its true nature was determined by the Falkland Islands Dependencies Survey (FIDS) who surveyed this nunatak in 1949. Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) for its association with nearby Saturn Glacier, Titan being one of the satellites of Saturn.

Titania Peak
Titania Peak (-71.53333°N, -69.41667°W) is a rock peak, 1,250 m, near the head of Uranus Glacier, 11 nautical miles (20 km) west-northwest of Mount Umbriel in central Alexander Island. First mapped from air photos taken by the Ronne Antarctic Research Expedition (RARE), 1947-48, by Searle of the Falkland Islands Dependencies Survey (FIDS) in 1960. Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) from association with Uranus Glacier, Titania being one of the satellites of Uranus.

Tito Peak
Tito Peak (-76.6°N, 162.28333°W) is a prominent peak over 600 m, located at the end of the ridge 2 miles east of Mount Creak in the southeast extremity of Endeavor Massif, Kirkwood Range. In association with Endeavour Massif, named after Ramon Tito, Able Seaman on HMNZS Endeavour who raised the first NZ flag over Scott Base, January 20, 1957.

Mount Titus
Mount Titus (-72.25°N, 169.03333°W) is a mountain, 2,840 m, surmounting the heights between the Staircase and Kelly Glaciers in the Admiralty Mountains, Victoria Land. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1960-62. Named by Advisory Committee on Antarctic Names (US-ACAN) for Robert W. Titus, meteorologist, station scientific leader at Hallett Station, 1961.

Tiw Valley
Tiw Valley (-77.6°N, 161.78333°W) is a valley lying next eastward of Odin Valley in the Asgard Range, Victoria Land. The feature is one in a group in this range named from Norse mythology, Tiw being the god of rules and regulations in war and peace. The name was suggested by Advisory Committee on Antarctic Names (US-ACAN) in consultation with the New Zealand Antarctic Place-Names Committee (NZ-APC).

Tjuvholene Crags
Tjuvholene Crags (-71.95°N, 4.46667°W) is a high rock crags, 2,495 m, which form the north end of Mount Grytoyr in the Muhlig-Hofmann Mountains of Queen Maud Land. Mapped from surveys and air photos by the Norwegian Antarctic Expedition (1956-60) and named Tjuvholene (the thief's lair).

Toadstool Rocks
Toadstool Rocks (-68.83333°N, -69.41667°W) is an insular rocks, ice-covered and rising to 2.5 m above sea level in the southwest part of Marguerite Bay, east-southeast of Terminal Island, Alexander Island. The rocks were roughly charted from RRS association with Mushroom Island and Puffball Islands.

Tobin Mesa
Tobin Mesa (-73.28333°N, 162.86667°W) is a large mesa in the Mesa Range, between Pain Mesa on the north and Gair Mesa on the south. Named by the Northern Party of New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1962-63, for James Tobin, surveyor with this party.

Toboggan Gap
Toboggan Gap (-72.26667°N, 166.05°W) is a pass through the Millen Range just north of Turret Peak, offering good sledging from the polar plateau to the Pearl Harbor Glacier neve. Named by the Southern Party of NZFMCAE, 1962-63.

Tobogganers Icefall
Tobogganers Icefall (-71.51667°N, 163.5°W) is a prominent icefall in the west-flowing tributary to Sledgers Glacier, located at the north side of Molar Massif in the Bowers Mountains. Named by the New Zealand Antarctic Place-Names Committee (NZ-APC) in 1983 in association with nearby Sledgers Icefall from a proposal by geologist M.G. Laird.

Tocci Glacier
Tocci Glacier (-72.16667°N, 168.3°W) is a steep tributary glacier descending from Mount Lozen to enter the north side of Tucker Glacier, in the Admiralty Mountains. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1960-64. Named by Advisory Committee on Antarctic Names (US-ACAN) for Joseph J. Tocci II, U.S. Navy, aerographer's mate at McMurdo Station, 1967.

Mount Tod
Mount Tod (-67.21667°N, 50.65°W) is a mountain on the southwest side of Auster Glacier, at the head of Amundsen Bay in Enderby Land. Plotted from air photos taken from ANARE (Australian National Antarctic Research Expeditions) aircraft in 1956. Named by Antarctic Names Committee of Australia (ANCA) for I.M. Tod, weather observer at Mawson Station in 1961.

Todd Glacier
Todd Glacier (-68.05°N, -67.05°W) is a glacier 7 nautical miles (13 km) long flowing southwest into Calmette Bay, western Graham Land. Photographed from the air by Ronne Antarctic Research Expedition (RARE), 1947. Surveyed by British Antarctic Survey (BAS), 1961-62. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) for Gertrude E. Todd, BAS Scientific Officer and Editor, employed in the London Office, 1950-63.

Todd Gully
Todd Gully (-76.71667°N, 159.7°W) is a valley about 0.7 nautical miles (1.3 km) west of Brock Gully in the Allan Hills, Victoria Land. Reconnoitered by the New Zealand Antarctic Research Program (NZARP) Allan Hills Expedition (1964) who named it after the dialect name for a fox because of the resemblance to fox country in parts of England.

Todd Hill
Todd Hill (-77.85°N, 163.05°W) is a bluff type elevation (1,245 m) which forms the south extremity of the Briggs Hill massif and the north point of entrance to Descent Pass (leading to Ferrar Glacier), in Victoria Land. Named in 1992 by Advisory Committee on Antarctic Names (US-ACAN) after Ronald L. Todd from Sebree, Kentucky 42455, cartographer, United States Geological Survey (USGS); member of the USGS field team which established geodetic control in the Hudson Mountains, Jones Mountains, Thurston Island and Farwell Island areas of Walgreen Coast and Eights Coast during the 1968-69 season.

Todd Ridge
Todd Ridge (-85.26667°N, -119.31667°W) is a narrow, flat-topped rock ridge at the northwest end of Long Hills, Horlick Mountains. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy aerial photography, 1958-60. Named by Advisory Committee on Antarctic Names (US-ACAN) for Marion N. Todd, aurora scientist at Byrd Station in 1958.

Mount Todd
Mount Todd (-78.05°N, -85.93333°W) is a peak in the Sentinel Range, Ellsworth Mountains, rising to 3,600 m on the east side of Embree Glacier, 2 nautical miles (3.7 km) north-northeast of Mount Press. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy aerial photography, 1957-60. Named in 1984 by Advisory Committee on Antarctic Names (US-ACAN) after Edward P. Todd, physicist, National Science Foundation, 1963-84, Director, Division of Polar Programs, National Science Foundation (NSF), 1977-84, with responsibility for the development of the U.S. Antarctic Research Program.

Toddy Pond
Toddy Pond (-76.7°N, 161.35°W) is a pond in an enclosed basin on the rock flats 2 nautical miles (3.7 km) northwest of Flagship Mountain, in Convoy Range, Victoria Land. The name is in the nautical beverage theme similar to Rum Pond and Tot Pond in this range. Named by a 1989-90 New Zealand Antarctic Research Program (NZARP) field party.

Todt Ridge
Todt Ridge (-71.36667°N, 13.95°W) is a partially snow-covered ridge, 3 nautical miles (6 km) long, lying 5 nautical miles (9 km) east of Mount Mentzel at the east end of the Gruber Mountains of Queen Maud Land. Discovered by the German Antarctic Expedition, 1938-39, under Captain Alfred Ritscher. Named for Herbert Todt, an assistant to Ritscher who served as home secretary for the expedition.

The Toe
The Toe (-62.33333°N, -59.18333°W) is a point marking the south side of the entrance to Harmony Cove on the west side of Nelson Island, in the South Shetland Islands. This descriptive name seems first to appear on a chart based upon a 1935 survey by DI personnel on the Discovery II.

Tofani Glacier
Tofani Glacier (-68.35°N, -65.58333°W) is a glacier flowing northeast into the head of Solberg Inlet, Bowman Coast, to the north of Houser Peak. The feature was photographed from the air by United States Antarctic Service (USAS), 1940, U.S. Navy, 1966, and was surveyed by Falkland Islands Dependencies Survey (FIDS), 1946-48. Named by Advisory Committee on Antarctic Names (US-ACAN) in 1977 after Dr. Walter Tofani, M.D., station physician at Palmer Station, 1975.

Tofte Glacier
Tofte Glacier (-68.8°N, -90.7°W) is a glacier immediately south of Sandefjord Cove on the west side of Peter I Island. Discovered in 1927 by a Norwegian expedition in the Odd I and named for Eyvind Tofte, leader of the expedition.

Toilers Mountain
Toilers Mountain (-71.73333°N, 164.86667°W) is a massive peak (1,955 m) standing 4 nautical miles (7 km) northeast of Halverson Peak in the northwest end of the King Range, Concord Mountains. The peak was used as a gravity station by the northern party of New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1963-64. So named by them because of the long climb and unpleasant conditions encountered in occupying the summit.

Tokarev Island
Tokarev Island (-66.53333°N, 92.98333°W) is an one of the small islands in the Haswell Islands, lying 0.1 nautical miles (0.2 km) west of Gorev Island. Discovered and first mapped by the Australasian Antarctic Expedition (1911-14) under Douglas Mawson. Photographed by the Soviet Antarctic Expedition (1956) and named for Aleksey K. Tokarev (1915-57), biologist on the expedition who died while returning from the Antarctic. == See also == * List of antarctic and sub-antarctic islands

Mount Tokoroa
Mount Tokoroa (-71.21667°N, 162.83333°W) is a massive snow-covered mountain on a spur from the Explorers Range, Bowers Mountains, standing 6 nautical miles (11 km) southeast of the summit of Mount Soza at the junction of the Morley and Carryer Glaciers. Mapped by the United States Geological Survey (USGS) Topo West party, 1962-63, and named by members of this party for Tokoroa, New Zealand, in recognition of its kindness to United States Antarctic Research Program (USARP) personnel.

Mount Tolchin
Mount Tolchin (-85.1°N, -65.2°W) is a mountain, 1,730 m, standing 5 nautical miles (9 km) southwest of Houk Spur at the southwest extremity of Mackin Table in southern Patuxent Range, Pensacola Mountains. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1956-66. Named by Advisory Committee on Antarctic Names (US-ACAN) for Lieutenant Sidney Tolchin (MC) U.S. Navy, officer in charge of South Pole Station, winter 1959.

Tollefson Nunatak
Tollefson Nunatak (-74.41667°N, -72.41667°W) is a nunatak lying 5 nautical miles (9 km) west of Olander Nunatak, being one of several scattered and somewhat isolated nunataks located 40 nautical miles (70 km) north of the Merrick Mountains, in Ellsworth Land. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1961-67. Named by Advisory Committee on Antarctic Names (US-ACAN) for T.W. Tollefson, construction electrician at Eights Station in 1963.

Mount Tolley
Mount Tolley (-77.28333°N, -143.11667°W) is a peak, 1,030 m, standing 2 nautical miles (3.7 km) south of Mount Swartley in the Allegheny Mountains of the Ford Ranges, Marie Byrd Land. Discovered on aerial flights from West Base of the United States Antarctic Service (USAS) (1939-41) and named for president William P. Tolley of Allegheny College, Pennsylvania.

Toltec Butte
Toltec Butte (-76.63333°N, 159.88333°W) is a truncated peak east of Harris Valley in the Shipton Ridge of the Allan Hills, Victoria Land. Reconnoitered by the New Zealand Antarctic Research Program (NZARP) Allan Hills Expedition (1964) who named the feature for its resemblance to buildings of the civilization of the same name.

Tomandl Nunatak
Tomandl Nunatak (-76.81667°N, -144.95°W) is an isolated nunatak on the south side of Crevasse Valley Glacier, 7 nautical miles (13 km) east of Mount Stancliff, in the Ford Ranges of Marie Byrd Land. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1959-65. Named by Advisory Committee on Antarctic Names (US-ACAN) for Frank Tomandl, Jr., aviation electrician's mate, U.S. Navy, of the McMurdo Station winter party, 1968.

Tombaugh Cliffs
Tombaugh Cliffs (-71.08333°N, -68.3°W) is an ice-free cliffs which stand at the north side of the mouth of Pluto Glacier and face George VI Sound, on the east side of Alexander Island. Photographed from the air by the Ronne Antarctic Research Expedition (RARE), 1947-48; surveyed by Falkland Islands Dependencies Survey (FIDS), 1948-50. The naming by the United Kingdom Antarctic Place-Names Committee (UK-APC) continues the astronomy related or celestial theme displayed in the toponymy of this area. Clyde W. Tombaugh, American astronomer at Lowell Observatory, discovered the planet Pluto in 1930.

Tomblin Rock
Tomblin Rock (-57.06667°N, -26.65°W) is an isolated rock 0.7 nautical miles (1.3 km) east-southeast of Demon Point, Candlemas Island, in the South Sandwich Islands. It was charted and named Black Rock by personnel on RRS Discovery II in 1930, but that name was changed to avoid duplication. Renamed by United Kingdom Antarctic Place-Names Committee (UK-APC) in 1971 for John F. Tomblin, British Antarctic Survey (BAS) geologist who made a detailed study of rocks at Candlemas Island in 1964.

Tombstone Hill (Palmer Archipelago)
Tombstone Hill (-64.81667°N, -63.51667°W) is a hill which rises to 50 m close east-northeast of Damoy Point, Wiencke Island, in the Palmer Archipelago. Discovered and first mapped by the French Antarctic Expedition, 1903-05, under Charcot. The name given by the Falkland Islands Dependencies Survey (FIDS) in 1944 is descriptive of some rocks on the top of the hill.

Tombstone Hill
Tombstone Hill (-72.45°N, 169.7°W) is a prominent hill (1,050 m) on the north side of Edisto Glacier in the Admiralty Mountains, Victoria Land. Its summit is littered with slabs of hard sedimentary rock, many of which are steeply tilted on end to give the appearance of a field of tombstones. Named by New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1957-58.

Tomilin Glacier
Tomilin Glacier (-69.5°N, 159°W) is a glacier over 15 nautical miles (28 km) long, draining north from Pope Mountain in central Wilson Hills. It enters the sea east of Goodman Hills and Cape Kinsey, forming a substantial glacier tongue. The glacier was photographed from aircraft of U.S. Navy Operation Highjump in 1947, and by the Soviet Antarctic Expedition in 1958. Named by the latter for Soviet polar aviator Mikhail N. Tomilin (1908-52), who perished in the Arctic.

Mount Tomlinson
Mount Tomlinson (-67.25°N, 51.18333°W) is a mountain 2 nautical miles (3.7 km) south of Mount Marsland in the northeast part of the Scott Mountains, Enderby Land. Plotted from air photos taken from ANARE (Australian National Antarctic Research Expeditions) aircraft in 1956. Named by Antarctic Names Committee of Australia (ANCA) for R.C. Tomlinson, a member of the crew of the Discovery during the British Australian New Zealand Antarctic Research Expedition (BANZARE), 1929-31.

Tommeliten Rock
Tommeliten Rock (-71.78333°N, -2.48333°W) is a small isolated rock 6 nautical miles (11 km) east of Lorentzen Peak on the Ahlmann Ridge in Queen Maud Land. Mapped by Norwegian cartographers from surveys and air photos by Norwegian-British-Swedish Antarctic Expedition (NBSAE) (1949-52) and air photos by the Norwegian expedition (1958-59) and named Tommeliten (Tom Thumb).

Tomovick Nunatak
Tomovick Nunatak (-74.98333°N, 161.85°W) is a nunatak along the southern side of the upper portion of Larsen Glacier, 9 nautical miles (17 km) west of Mount Gerlache in Victoria Land. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1956-62. Named by Advisory Committee on Antarctic Names (US-ACAN) for Donald S. Tomovick, U.S. Navy, utilitiesman at South Pole Station in 1966.

Tonagh Island
Tonagh Island (-67.1°N, 50.3°W) is a steep-sided, flat-topped island, 4 nautical miles (7 km) long and 2 nautical miles (3.7 km) wide, lying southwest of the mouth of Beaver Glacier in the south part of Amundsen Bay. Sighted in October 1956 by an ANARE (Australian National Antarctic Research Expeditions) party led by P.W. Crohn and named for Lieutenant Leslie Tonagh, DUKW driver with the ANARE, 1956. == See also == * List of antarctic and sub-antarctic islands

Toney Mountain
Toney Mountain (-75.8°N, -115.8°W) is an elongated snow-covered mountain, 38 nautical miles (70 km) long and rising to 3,595 m in Richmond Peak, located 35 nautical miles (60 km) southwest of Kohler Range in Marie Byrd Land. The mountain was probably among those viewed from a distance by Admiral Byrd and others of the United States Antarctic Service (USAS) in plane flights from the ship Bear in February 1940. It was mapped in December 1957 by the oversnow traverse party from Byrd Station to the Sentinel Range, 1957-58, led by C.R. Bentley who proposed the name. Named after George R. Toney, scientific leader at Byrd Station in 1957, a participant in several Antarctic and Arctic operations, serving in both field and administrative capacities.

Tongue Peak
Tongue Peak (-86.56667°N, -153.03333°W) is a peak rising to about 2,450 m between Holdsworth Glacier and Scott Glacier, 3 nautical miles (6 km) west-northwest of Mount Farley, in the Queen Maud Mountains. The peak was mapped by United States Geological Survey (USGS) from surveys and U.S. Navy aerial photographs, 1960-64. It was geologically mapped by a United States Antarctic Research Program (USARP)-Arizona State University field party, 1978-79, and was named by geologist Scott G. Borg, a member of the party. The name derives from a well developed tongue-shaped moraine in an abandoned cirque between the west and north ridges of the peak.

Tongue Rock
Tongue Rock (-67.55°N, 62°W) is an insular rock just north of Low Tongue, off Mac. Robertson Land. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition, 1936-37, and named Tangskjera (the tongue rock). The translated form of the name recommended by Antarctic Names Committee of Australia (ANCA) has been approved.

Tongue Rocks
Tongue Rocks (-63.63333°N, -57.35°W) is a small ice-free volcanic rocks lying between Eagle Island and Beak Island, off Trinity Peninsula. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) in association with Eagle and Beak Islands.

Tonkin Island
Tonkin Island (-67.81667°N, -65.05°W) is a narrow, ice-capped island 3.5 nautical miles (6 km) long in a north-south direction, marked by ice-free peaks at each end, lying 11 nautical miles (20 km) southeast of Choyce Point, Bowman Coast, in Larsen Ice Shelf. The island was discovered and photographed from the air by the United States Antarctic Service (USAS) in 1940. It was charted by the Falkland Islands Dependencies Survey (FIDS) in 1947 and named after John E. Tonkin, FIDS general assistant at Stonington Island, 1945-47; named Lewis Island by Ronne Antarctic Research Expedition (RARE) following additional aerial photography, 1947. The names Isla Mateo de Toro Zambrano and Isla Riquelme, referring to the north and south parts of this feature shown as two islands, appear on a Chilean hydrographic chart, 1947. == See also == * List of antarctic and sub-antarctic islands

Tonnesen Glacier
Tonnesen Glacier (-72.06667°N, 3.46667°W) is a broad glacier flowing north between Risemedet Mountain and Festninga Mountain, separating the Gjelsvik Mountains and the Muhlig-Hofmann Mountains in Queen Maud Land. Mapped by Norwegian cartographers from surveys and air photos by the Norwegian Antarctic Expedition (1956-60) and named for J. Tonnesen, meteorologist with Norwegian Antarctic Expedition (1956-58).

Tonsberg Cove
Tonsberg Cove (-60.53333°N, -45.91667°W) is a cove 1 nautical mile (1.9 km) southeast of Penguin Point on the north coast of Coronation Island, in the South Orkney Islands. Charted in 1912-13 by Petter Sorlle, Norwegian whaling captain and named after the Tonsberg Hvalfangeri, of Tonsberg, Norway, a company which operated a permanent whaling base in the South Orkney Islands in the period 1920-30.

Tonsberg Point
Tonsberg Point (-54.16667°N, -36.65°W) is the east extremity of a low rocky peninsula which projects into Stromness Bay, South Georgia, separating Stromness Harbor on the north from Husvik Harbor on the south. The name was in use as early as 1912 and derives from the Tonsberg Hvalfangeri, Norwegian whaling company with works at Husvik Harbor.

Mount Toogood
Mount Toogood (-71.61667°N, 160.23333°W) is a mountain (2,100 m) at the south side of the head of Edwards Glacier in the Daniels Range, Usarp Mountains. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1960-63. Named by Advisory Committee on Antarctic Names (US-ACAN) for David J. Toogood, United States Antarctic Research Program (USARP) geologist at McMurdo Station, 1967-68 and 1968-69.

Tooth Peak
Tooth Peak (-72.78333°N, 162.05°W) is a small sharp peak on the north end of Sculpture Mountain in the upper Rennick Glacier. Named for its tooth-like shape by the Northern Party of New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1962-63.

Tooth Rock
Tooth Rock (-62.86667°N, -61.4°W) is a rock rising 85 m above sea level, the largest of a group of rocks south of Cape Conway, Snow Island, in the South Shetland Islands. Descriptively named following survey by a Royal Navy Hydrographic Survey Unit form John Biscoe in 1951-52.

The Tooth
The Tooth (-77.51667°N, 168.98333°W) is a distinctive rock outcrop on the eastern slopes of Mount Terror, Ross Island, at an elevation of about 1,400 meters. The feature lies 1 nautical mile (1.9 km) south-southeast of Tent Peak and is reported to resemble a fossilized shark's tooth. Descriptively named by a party of the New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1958-59, working in eastern Ross Island.

Tophet Bastion
Tophet Bastion (-60.7°N, -45.28333°W) is a conspicuous ice-capped rock wall, 1 nautical mile (1.9 km) long, with an apron of talus. It stands 1 nautical mile (1.9 km) east of Saunders Point on the south coast of Coronation Island in the South Orkney Islands. Roughly surveyed in 1933 by DI personnel. The name, which is biblical, was applied by the Falkland Islands Dependencies Survey (FIDS) following their survey of 1948-49.

Topografov Island
Topografov Island (-68.5°N, 78.18333°W) is an island just north of Partizan Island in the north part of the entrance to Langnes Fjord, Vestfold Hills. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition (1936-37). Subsequently photographed by U.S. Navy Operation Highjump (1946-47), ANARE (Australian National Antarctic Research Expeditions) (1954-58) and the Soviet Antarctic Expedition (1956). The latter named it Ostrov Topografov (topographers' island). == See also == * List of antarctic and sub-antarctic islands

Topping Cone
Topping Cone (-77.48333°N, 169.26667°W) is an exposed volcanic cone near Cape Crozier, located 1.75 nautical miles (3.2 km) northwest of the summit of The Knoll in eastern Ross Island. Named by New Zealand Antarctic Place-Names Committee (NZ-APC) for W.W. Topping, geologist with Victoria University of Wellington Antarctic Expedition (VUWAE) which examined the cone in the 1969-70 season.

Topside Glacier
Topside Glacier (-76.7°N, 160.95°W) is a cirque glacier, 0.5 nautical miles (0.9 km) long, descending the south wall of Elkhorn Ridge in Greenville Valley, Convoy Range, Victoria Land. The name is a nautical approximation of the situation of the glacier. Named by a 1989-90 New Zealand Antarctic Research Program (NZARP) field party to the area.

Tor Point
Tor Point (-54.2°N, -36.56667°W) is a point forming the east side of the entrance to Jason Harbor in Cumberland West Bay, South Georgia. The name appears to be first used on a 1930 British Admiralty chart.

Torbert Escarpment
Torbert Escarpment (-83.48333°N, -54.13333°W) is an escarpment, 15 nautical miles (28 km) long, marking the west margin of Median Snowfield in the Neptune Range, Pensacola Mountains. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1956-66. Named by Advisory Committee on Antarctic Names (US-ACAN) after Mount Torbert, the salient feature along its edge.

Mount Torbert
Mount Torbert (-83.5°N, -54.41667°W) is a prominent, pyramidal rock peak, 1,675 m, midway along Torbert Escarpment in the Neptune Range, Pensacola Mountains. Discovered and photographed on January 13, 1956 on the transcontinental nonstop plane flight by personnel of U.S. Navy Operation Deep Freeze I from McMurdo Sound to Weddell Sea and return. Named by Advisory Committee on Antarctic Names (US-ACAN) for Lieutenant Commander John H. Torbert, U.S. Navy, pilot of the P2V-2N Neptune aircraft making this flight.

Torbjorn Rocks
Torbjorn Rocks (-71.88333°N, 6.35°W) is a group of rocks lying in the mouth of Lunde Glacier in the Muhlig-Hofmann Mountains, Queen Maud Land. Plotted from surveys and air photos by the Norwegian Antarctic Expedition (1956-60) and named for Torbjorn Lunde, glaciologist with Norwegian Antarctic Expedition (1956-58).

Torckler Rocks
Torckler Rocks (-68.58333°N, 77.93333°W) is a three small islands lying at the north side of the entrance to Heidemann Bay, Vestfold Hills. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition, 1936-37. Remapped from ANARE (Australian National Antarctic Research Expeditions) air photos and named for R.M. Torckler, radio officer at Davis Station in 1959.

Mount Torckler
Mount Torckler (-66.86667°N, 52.73333°W) is a mountain 3 nautical miles (6 km) southeast of Mount Smethurst and 28 nautical miles (50 km) southwest of Stor Hanakken Mountain in Enderby Land. Plotted from air photos taken from ANARE (Australian National Antarctic Research Expeditions) aircraft in 1957. Named by Antarctic Names Committee of Australia (ANCA) for R.M. Torckler, radio officer at Wilkes Station in 1961.

Torgersen Island
Torgersen Island (-64.76667°N, -64.08333°W) is a small rocky island lying just east of Litchfield Island in the entrance to Arthur Harbor, off the southwest coast of Anvers Island in the Palmer Archipelago. Surveyed by the Falkland Islands Dependencies Survey (FIDS) in 1955. Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) for Torstein Torgersen, first mate of the Harbor in late February 1955, preceding the Norsel in one of the ship's boats and making soundings. == See also == * List of antarctic and sub-antarctic islands

Torgny Peak
Torgny Peak (-71.85°N, 8.1°W) is a bare rock peak 2 nautical miles (3.7 km) west of Fenriskjeften Mountain in the Drygalski Mountains of Queen Maud Land. Photographed from the air by the German Antarctic Expedition (1938-39). Mapped from surveys and air photos by Norwegian Antarctic Expedition (1956-60) and named for Torgny Vinje, meteorologist with Norwegian Antarctic Expedition (1956-60).

Torii Glacier
Torii Glacier (-71.31667°N, 35.63333°W) is a glacier flowing northwest between Mount Goossens and Mount Fukushima in the Queen Fabiola Mountains. Discovered on October 7, 1960 by the Belgian Antarctic Expedition, under Guido Derom, who named it after Tetsuya Torii, geochemist; leader of the Japanese party that visited this area in November 1960.

Mount Torii
Mount Torii (-77.61667°N, 162.73333°W) is a prominent bluff-type mountain above Lake Chad and Lake Hoare, surmounting the north wall of Taylor Valley between Suess Glacier and Canada Glacier, in Victoria Land. Named by Advisory Committee on Antarctic Names (US-ACAN) (1997) after Tetsuya Torii (Torii Glacier), geochemist, Japan Polar Research Association, who led Japanese research parties in geochemical studies of the lakes and ponds of McMurdo Dry Valleys in 20 summer field seasons, 1963 though 1986-87.

Torinosu Cove
Torinosu Cove (-69.48333°N, 39.56667°W) is a narrow cove in the eastern part of Lutzow-Holm Bay. It indents the west side of Skarvsnes Foreland 1.5 nautical miles (2.8 km) west of Mount Suribachi, on the coast of Queen Maud Land. Mapped from surveys and air photos by Japanese Antarctic Research Expedition (JARE), 1957-62. The name "Torinosu-wan" (bird's nest cove) was given by JARE Headquarters in 1973.

Torlyn Mountain
Torlyn Mountain (-67.78333°N, 66.91667°W) is an elongated mountain, of which Murray Monolith is the detached front, standing 4 nautical miles (7 km) east of Scullin Monolith on the coast of Mac. Robertson Land. In January and February 1931 several Norwegian whale catchers explored along this coast, making sketches of the land from their vessels. They named the mountain for their whale catcher, the Torlyn, from whose deck it was seen in February, although the coast was sketched as early as January 19 from the Bouvet II, another Norwegian whaler. The British Australian New Zealand Antarctic Research Expedition (BANZARE) under Mawson made an airplane flight over this area in January 1930, returning for further exploration in February 1931. They named the mountain Murray Monolith, which name is hereby retained only for the detached front.

Tornquist Bay
Tornquist Bay (-54.06667°N, -36.98333°W) is a small bay between Cape Constance and Antarctic Point along the north coast of South Georgia. Charted in 1929-30 by DI personnel, who called it Windy Cove, because of strong gusts of wind experienced there, but the name Windy Hole was subsequently used on charts for the bay. Following a survey of South Georgia in 1951-52, the SGS reported that this feature is known to the whalers and sealers as Tornquist Bay, because the wreck of the Cape Constance on October 16, 1950, lies near its west shore. This latter name is approved on the basis of local usage; the name Windy Hole is never used locally. The name Windy Cove, originally applied to this bay, has been transferred in local usage to the bay immediately southeast of Antarctic Point and it has since become established there.

Toro Point
Toro Point (-63.31667°N, -57.9°W) is a point which forms the south extremity of Schmidt Peninsula and the north side of the entrance to Unwin Cove, Trinity Peninsula. Named by the fifth Chilean Antarctic Expedition (1950-51) after Carlos Toro Mazote G. who, as an aviation lieutenant in 1947, was one of the men chosen to occupy the General Bernardo O'Higgins station nearby. He was also a member of the fifth Chilean expedition aboard the ship Lientur.

Cape Torson
Cape Torson (-66.66667°N, 90.6°W) is a point at the east side of Posadowsky Bay on the coast of Antarctica. First mapped from air photos taken by U.S. Navy Operation Highjump, 1946-47. Remapped by the Soviet expedition 1956, who named it after Lieutenant K.P. Torson, of the ship Vostok in the Bellingshausen expedition 1819-21.

Tortoise Hill
Tortoise Hill (-64.36667°N, -57.5°W) is a hill more than 500 m high, 3 nautical miles (6 km) west of The Watchtower at the southeast corner of James Ross Island. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) following Falkland Islands Dependencies Survey (FIDS) surveys, 1958-61. The feature is similar geologically and in appearance to Terrapin Hill in the northeast portion of the island; hence the application of a related name.

Tortula Cove
Tortula Cove (-54.23333°N, -36.5°W) is a cove close south of Mai Point, on the east side of Maiviken in Cumberland Bay, South Georgia. Roughly surveyed by the Swedish Antarctic Expedition, 1901-04, under Nordenskjold. Resurveyed in 1929 by DI personnel, and in 1951 by the Falkland Islands Dependencies Survey (FIDS). Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) after the moss (genus Tortula) which grows in this vicinity.

Tot Island
Tot Island (-65.51667°N, -64.33333°W) is a small island lying just north of the northeast end of Lahille Island, off the west coast of Graham Land. First charted by the British Graham Land Expedition (BGLE) under Rymill, 1934-37. So named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1959 because the island is very small. == See also == * List of antarctic and sub-antarctic islands

Tot Pond
Tot Pond (-76.9°N, 161.11667°W) is the smaller and western of two closely spaced frozen ponds in the floor of Alatna Valley, filled by overflow from the larger adjacent Rum Pond, in the Convoy Range, Victoria Land. Named by a 1989-90 New Zealand Antarctic Research Program (NZARP) field party (Trevor Chinn) in association with Rum Pond; in nautical circles a tot is a traditional small issue of rum.

Toth Nunataks
Toth Nunataks (-73.55°N, -64.75°W) is a small group of isolated nunataks located 17 nautical miles (31 km) north-northwest of Mount Coman in Palmer Land. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1961-67. Named by Advisory Committee on Antarctic Names (US-ACAN) for Stephen R. Toth, glaciologist at Byrd Station, summer 1965-66.

Mount Toth
Mount Toth (-86.36667°N, -155.25°W) is the easternmost peak, 2,410 m, on the small ice-covered ridge 5 nautical miles (9 km) east of Mount Kendrick, in the Queen Maud Mountains. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1960-64. Named by Advisory Committee on Antarctic Names (US-ACAN) for Commander Arpad J. Toth, U.S. Navy Reserve, operations officer in charge of Williams Field, McMurdo Sound, 1962-64.

Tottan Hills
Tottan Hills (-75.03333°N, -12.41667°W) is a group of rocky hills 20 nautical miles (37 km) in extent, forming the southwestern portion of Heimefront Range in Queen Maud Land. The hills were observed and photographed by the Norwegian-British-Swedish Antarctic Expedition in the course of air reconnaissance from Maudheim in January 1952. Named after the supply ship Tottan, used to establish and resupply the British Royal Society IGY station on the Brunt Ice Shelf, 1955-58. During the 1957-58 season, Tottan also unloaded supplies at Norway station on Princess Martha Coast.

Totten Glacier
Totten Glacier (-67°N, 116.33333°W) is a massive glacier about 40 nautical miles (70 km) long and 20 nautical miles (37 km) wide. It drains northeastward from the continental ice but turns northwestward at the coast where it terminates in a prominent tongue close east of Cape Waldron. Delineated from aerial photographs taken by U.S. Navy Operation Highjump (1946-47). Named by Advisory Committee on Antarctic Names (US-ACAN) for George M. Totten, Passed Midshipman on the Wilkes with correction of the survey data obtained by the expedition.

Totten Glacier Tongue
Totten Glacier Tongue (-66.58333°N, 116.08333°W) is a prominent glacier tongue extending seaward from Totten Glacier. Delineated from air photos taken by U.S. Navy Operation Highjump (1946-47) and named by Advisory Committee on Antarctic Names (US-ACAN) in association with Totten Glacier.

Tottsuki Point
Tottsuki Point (-68.91667°N, 39.83333°W) is a small rock point lying 3 nautical miles (6 km) southwest of Flattunga on the coast of Queen Maud Land. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition, 1936-37. Surveyed by Japanese Antarctic Research Expedition (JARE), 1957-62, and named Tottsuki-misaki (first point).

Touchdown Glacier
Touchdown Glacier (-79.8°N, 158.16667°W) is a tributary of Darwin Glacier, flowing south between Roadend Nunatak and the Brown Hills. Mapped by the Victoria University of Wellington Antarctic Expedition (VUWAE) (1962-63) and so named because the glacier was used as a landing site for aircraft supporting the expedition.

Touchdown Hills
Touchdown Hills (-78.11667°N, -35°W) is a group of snow-covered hills extending south from Vahsel Bay on the east side of the Filchner Ice Shelf. So named by the Commonwealth Trans-Antarctic Expedition in 1957 because one of the expedition members, while piloting a plane fitted with skis, mistook these hills for clouds and hit them, bounding upwards undamaged.

Tour de Pise
Tour de Pise (-66.66667°N, 140.01667°W) is an isolated rock dome, 27 m, which protrudes through the ice in northwest Rostand Island in the Geologie Archipelago. Charted in 1951 by the French Antarctic Expedition and named by them for the famous Tower of Pisa.

Mount Touring Club
Mount Touring Club (-65.28333°N, -63.93333°W) is a small snow-capped peak near the extremity of a spur that descends southwestward from Mount Peary, on the west side of Graham Land. Discovered and named "Sommet du Touring Club" by the French Antarctic Expedition (1908-10) under Dr. Jean B. Charcot. A party from the expedition hiked along the southern side of this feature in the course of charting the area.