Wikipedia:WikiProject Missing encyclopedic articles/Antarctica/T4

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Tverrseten Col
Tverrseten Col (-72.01667°N, 4.76667°W) is an ice col between Setenuten Peak and Petrellfjellet in the Muhlig-Hofmann Mountains, Queen Maud Land. Mapped by Norwegian cartographers from surveys and air photos by the Norwegian Antarctic Expedition (1956-60) and named Tverrseten (the transverse seat).

Tverrveggen Ridge
Tverrveggen Ridge (-72.28333°N, 1.33333°W) is a prominent ridge which extends southward for 4 nautical miles (7 km) from Tverrbrekka Pass in the Sverdrup Mountains, 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 Tverrveggen (the transverse wall).

Tvetaggen Peaks
Tvetaggen Peaks (-71.75°N, 25.28333°W) is a short line of peaks standing 1.5 nautical miles (2.8 km) north of Austkampane Hills on the west side of Kamp Glacier, in the Sor Rondane Mountains. Mapped by Norwegian cartographers in 1957 from air photos taken by U.S. Navy Operation Highjump, 1946-47, and named Tvetaggen (the double prongs) because of their appearance.

Tvibasen Valley
Tvibasen Valley (-71.88333°N, 5.25°W) is an ice-filled valley whose upper portion divides into two heads, lying between Svarthamaren Mountain and Cumulus Mountain in the Muhlig-Hofmann Mountains of Queen Maud Land. Mapped from surveys and air photos by the Norwegian Antarctic Expedition (1956-60) and named Tvibasen (the double stall).

Tvireita Moraine
Tvireita Moraine (-71.91667°N, 14.61667°W) is a moraine, about 5 nautical miles (9 km) long, comprising two somewhat parallel segments that appear to unite as they trend northeast, located in the east part of Mendeleyev Glacier in the Payer Mountains, Queen Maud Land. Plotted from air photos and surveys by Norwegian Antarctic Expedition, 1956-60, and named Tvireita (two furrows).

Tvistein Pillars
Tvistein Pillars (-68.7°N, -90.66667°W) is a two flat-topped pillar rocks standing 1 nautical mile (1.9 km) southwest of Cape Eva, the north extremity of Peter I Island. The rocks were sighted from the Odd I by a Norwegian expedition under Eyvind Tofte in 1927. The name Tvistein (two stones) was applied by a Norwegian expedition under Nils Larsen which charted the island from the Norvegia in 1929.

Tvora
Tvora (-72.16667°N, -0.08333°W) is a mountain with two north-trending spurs, about 3 nautical miles (6 km) east of Straumsvola Mountain in the Sverdrup Mountains, Queen Maud Land. Plotted from air photos by the German Antarctic Expedition (1938-39). Remapped 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 Tvora (two ridges).

Tweeny Point
Tweeny Point (-54.23333°N, -36.61667°W) is a point lying 1 nautical mile (1.9 km) southwest of Doubtful Point in Cumberland West Bay, South Georgia. The name appears to be first used on a 1929 British Admiralty chart.

Twickler Cone
Twickler Cone (-77.61667°N, 162.36667°W) is a cone-shaped peak in the Asgard Range, Victoria Land, rising to 1,950 m on the ridge separating the upper reaches of Bartley Glacier and Newall Glacier. Named by Advisory Committee on Antarctic Names (US-ACAN) in 1997 after Mark S. Twickler, a specialist in recovery, analysis, and interpretation of ice core records, with many seasons in Antarctica and Greenland, 1984-95; Executive Director, National Ice Core Laboratory-Science Management Office, from 1997. As a member of a University of New Hampshire field party, 1988-89, Twickler participated in glaciochemical investigations that collected two ice cores, 150 and 175 m deep, from upper Newall Glacier, in proximity of this peak.

Twig Rock
Twig Rock (-68.7°N, -67.53333°W) is a small rocky mass, more than 90 m high, between Alamode Island and Hayrick Island in the Terra Firma Islands, off the west coast of Graham Land. The Terra Firma Islands were first visited and surveyed in 1936 by the British Graham Land Expedition (BGLE) under Rymill. Twig Rock was surveyed in 1948 by the Falkland Islands Dependencies Survey (FIDS), who so named it because of the branching nature of the dike system exposed on its north face.

Mount Twigg
Mount Twigg (-74.28333°N, 67.83333°W) is a large rock outcrop bisected by a north-trending glacier, standing 16 nautical miles (30 km) southeast of Mount Maguire near the head of Lambert Glacier. Mapped from ANARE (Australian National Antarctic Research Expeditions) air photos and surveys, 1956-58. Named by Antarctic Names Committee of Australia (ANCA) for D.R. Twigg, radio supervisor at Mawson Station, 1958.

Twilight Bay
Twilight Bay (-68.53333°N, 69.8°W) is a small re-entrant of the ice shelf into the plateau on the west side of the Amery Ice Shelf. Photographed from ANARE (Australian National Antarctic Research Expeditions) aircraft in 1956. The position of the feature was fixed by ANARE survey party in February 1968. So named because the survey party was flown into the area after sunset, necessitating navigation and photo identification in twilight.

Twin Crater
Twin Crater (-77.83333°N, 166.68333°W) is a crater with twin nested cones that rises behind McMurdo Station and 0.5 nautical miles (0.9 km) west of Crater Hill on Hut Point Peninsula, Ross Island. This crater was named Middle Crater by Frank Debenham of the British Antarctic Expedition, 1910-13, apparently for its location in relation to First Crater and Crater Hill, but the name has fallen into disuse. Twin Crater, alluding to the nested cones in the crater, was applied as early as 1971 and the name has become established because of consistent use in current maps and reports.

Twin Nunataks
Twin Nunataks (-75.63333°N, 159.6°W) is a two small nunataks lying between Ricker Hills and Hollingsworth Glacier in the Prince Albert Mountains, Victoria Land. Descriptively named by the Southern Party of the New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1962-63.

Twin Peaks
Twin Peaks (-63.4°N, -57.11667°W) is a two sharply defined peaks, 750 m, standing together 1.5 nautical miles (2.8 km) north of Mount Taylor and 2 nautical miles (3.7 km) west of the head of Hope Bay at the northeast end of Antarctic Peninsula. Discovered by the Swedish Antarctic Expedition, 1901-04, under Nordenskjold. Named by the Falkland Islands Dependencies Survey (FIDS) following their survey of the area in 1946.

Twin Pinnacles
Twin Pinnacles (-62.13333°N, -58.1°W) is a rock 20 m high marked by two summits, lying 0.1 nautical miles (0.2 km) northeast of Lions Rump at the west side of the entrance to King George Bay in the South Shetland Islands. Charted and named during 1937 by DI personnel on the Discovery II.

Twin Rocks
Twin Rocks (-78.41667°N, 161.68333°W) is a twin rock bluffs in the Lower Staircase of Skelton Glacier, about 6 nautical miles (11 km) east of Halfway Nunatak, in Victoria Land. The rocks are an important reference point on the route up the glacier. Descriptively named by the New Zealand party of the Commonwealth Trans-Antarctic Expedition, 1956-58.

The Twins
The Twins (-60.61667°N, -46.06667°W) is a two rocks lying together 0.5 nautical miles (0.9 km) south of the south end of Monroe Island in the South Orkney Islands. Charted and named in 1933 by DI personnel on the Discovery II.

Mount Twintop
Mount Twintop (-68.08333°N, 62.36667°W) is a twin-peaked mountain about 6 nautical miles (11 km) south-southwest of Mount Tritoppen in the south part of the David Range, Framnes Mountains. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition (1936-37) and named Tvitoppen (the twin peak). The translated form of the name recommended by Antarctic Names Committee of Australia (ANCA) has been adopted.

Mount Twiss
Mount Twiss (-79.38333°N, -85.6°W) is a peak (2,000 m) at the north end of Watlack Hills in the Heritage Range, Ellsworth Mountains. Mapped by United States Geological Survey (USGS) from ground surveys and U.S. Navy air photos, 1961-66. Named by Advisory Committee on Antarctic Names (US-ACAN) after John R. Twiss, Jr., who served on support staff at McMurdo Station, 1961-63; United States Antarctic Research Program (USARP) Representative at McMurdo Station, 1964-65 season; USARP Representative on USNS Eltanin Cruise 34, 1968; staff, National Science Foundation (NSF) International Decade of Ocean Exploration, 1970-74; Executive Director, Marine Mammal Commission, from 1974.

Twisted Lake
Twisted Lake (-60.71667°N, -45.66667°W) is a lake 0.1 nautical miles (0.2 km) northeast of Cummings Cove in western Signy Island. So named by United Kingdom Antarctic Place-Names Committee (UK-APC) because of the very irregular shoreline of the lake.

Twitcher Glacier
Twitcher Glacier (-54.71667°N, -35.93333°W) is a glacier, 4 nautical miles (7 km) long, which flows east from the Salvesen Range to the east coast of South Georgia, immediately south of Herz Glacier and Iris Bay. The glacier was surveyed in 1951-52 by the SGS. Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) for John Montagu, fourth Earl of Sandwich, First Lord of the Admiralty, 1771-82, who was popularly known as "Jemmy Twitcher."

Twitcher Rock
Twitcher Rock (-59.46667°N, -27.23333°W) is a rock in Douglas Strait, 55 m high, lying 0.7 nautical miles (1.3 km) east of the southeast point of Thule Island in the South Sandwich Islands. Discovered by a Russian expedition under Bellingshausen in 1820. Charted in 1930 by DI personnel on the Discovery II. They named it for John Montagu, fourth Earl of Sandwich, who was popularly known by the nickname "Jemmy Twitcher."

Two Hummock Island
Two Hummock Island (-64.13333°N, -61.7°W) is an ice-covered island, 5 nautical miles (9 km) long in a north-south direction, conspicuous for its two rocky summits 670 m high, lying 5 nautical miles (9 km) southeast of Liege Island in the Palmer Archipelago. This name has appeared on maps for over 100 years and its usage has become established internationally. == See also == * List of antarctic and sub-antarctic islands

Two Step Cliffs
Two Step Cliffs (-71.9°N, -68.21667°W) is the eastern face of a flat-topped sedimentary mountain, 680 m, immediately east of Mars Glacier on the east coast of Alexander Island. First seen from the air by Lincoln Ellsworth on November 23, 1935, and mapped from photos obtained on that flight by W.L.G. Joerg. Roughly surveyed from the ground in 1936 by the British Graham Land Expedition (BGLE) and in 1940-41 by the United States Antarctic Service (USAS), who used the names "Two Step Mountains" and "Table Mountain" for this feature. The name Two Step Cliffs derives from the name used by USAS, and was suggested by Falkland Islands Dependencies Survey (FIDS) following surveys in 1949 as being particularly descriptive of this feature.

Two Step Moraine
Two Step Moraine (-71.88333°N, -68.33333°W) is a small area of homogeneous fine morainic debris, in the south-facing moraines at the foot of Two Step Cliffs, Alexander Island. Containing moist soil and two ponds, the feature is remarkable for its abundance of mosses, algae, and cyanobacteria in such a southerly location. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) in 1993 in association with Two Step Cliffs.

Two Summit Island
Two Summit Island (-62.25°N, -58.95°W) is a small island marked by two prominent summits, lying at the east entrance to Fildes Strait in the South Shetland Islands. It was named Two Hummock Island by DI personnel following their survey in 1935, but this name has been rejected because of probable confusion with Two Hummock Island in the north entrance to Gerlache Strait. Two Summit Island, equally descriptive of the feature, was recommended by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1954. == See also == * List of antarctic and sub-antarctic islands

Twombley Glacier
Twombley Glacier (-80.58333°N, 157.75°W) is a glacier 6 nautical miles (11 km) long, flowing from the north side of Kent Plateau into the south side of Byrd Glacier. Named by Advisory Committee on Antarctic Names (US-ACAN) for C.E. Twombley of the U.S. Weather Bureau, a member of the Little America V winter party, 1956.

Mount Twomey
Mount Twomey (-71.5°N, 161.68333°W) is a somewhat detached peak (over 1,200 in.) situated on the northwest margin of the Morozumi Range, 2.5 nautical miles (4.6 km) northwest of Berg Peak. 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 Arthur A. Twomey, United States Antarctic Research Program (USARP) geologist at McMurdo Station, 1967-68 and 1968-69.

Tyke Nunatak
Tyke Nunatak (-80.21667°N, 153.58333°W) is the smallest and N-most of the Bates Nunataks at the west end of Britannia Range. So named because of its small size in relation to the two southern nunataks in the group.

Tyler Glacier
Tyler Glacier (-72.25°N, 168.58333°W) is a tributary glacier flowing southwest between Taylor Peak and Mount Francis to enter Tucker Glacier, in 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 Lieutenant Paul E. Tyler, U.S. Navy, medical officer at Hallett Station, 1962.

Tyndall Mountains
Tyndall Mountains (-67.25°N, -67.16667°W) is a mountains close south of Avsyuk Glacier in central Arrowsmith Peninsula, Graham Land. Mapped by Falkland Islands Dependencies Survey (FIDS) from surveys and air photos, 1948-59. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) for John Tyndall (1820-93), Irish mountaineer and pioneer glaciologist, author of many works on glaciers and the physical properties of ice.

Tyree Head
Tyree Head (-77.65°N, 167.41667°W) is a headland 3.2 nautical miles (6 km) northeast of Sultans Head Rock on the south side of Ross Island. The headland rises to over 400 m and is ice covered except for rock exposed on the lower east side. Named after Adm. David M. Tyree, U.S. Navy (d. 1984), Commander, U.S. Naval Support Force, Antarctica, 1959-62.

Mount Tyree
Mount Tyree (-78.4°N, -85.91667°W) is a very high and prominent bare-rock mountain (4,852 m) standing 8 nautical miles (15 km) northwest of Vinson Massif in the main ridge of the Sentinel Range, Ellsworth Mountains. It was discovered by U.S. Navy Squadron VX-6 during IGY reconnaissance flights of January 1958, and was mapped the same month by the Marie Byrd Land Traverse Party, 1957-58, under C.R. Bentley. Named by Advisory Committee on Antarctic Names (US-ACAN) for Rear Admiral David M. Tyree, U.S. Navy, Commander, U.S. Naval Support Force, Antarctica, from April 14, 1959 to November 26, 1962.

Tyrol Valley
Tyrol Valley (-77.58333°N, 160.63333°W) is a high ice-free valley lying east of Mount Baldr in the Asgard Range, Victoria Land. The valley was named by Austrian biologist Heinz Janetschek, a participant in the United States Antarctic Research Program (USARP) program in this area in 1961-62, after his native Tirol (Tyrol).

Tyrrell Glacier
Tyrrell Glacier (-54.36667°N, -36.51667°W) is a glacier flowing north into the head of Moraine Fjord where it joins Harker Glacier, on the north coast of South Georgia. Named by the United Kingdom Antarctic Place-Names Committee (UK-APC), 1982, in association with Harker Glacier, after George W. Tyrrell (1883-1961), Senior Lecturer in geology, Glasgow University, 1919-48, author of several early papers on the petrology of South Georgia, the South Shetland Islands, and the Palmer Archipelago area.

Mount Tyrrell
Mount Tyrrell (-69.63333°N, -69.51667°W) is a mountain with two summits, the highest 1,310 m, standing 3 nautical miles (6 km) inland from the east coast of Alexander Island on the east side and near the mouth of Toynbee Glacier. First photographed from the air in 1937 by the British Graham Land Expedition (BGLE) under Rymill. Surveyed in 1948 by the Falkland Islands Dependencies Survey (FIDS) and named by them for George W. Tyrrell, British geologist at Glasgow University.

Tysk Pass
Tysk Pass (-72.71667°N, -3.78333°W) is a mountain pass between Hogskavlen Mountain and Domen Butte in the Borg Massif, Queen Maud Land. The feature was first photographed from the air by the German Antarctic Expedition (1938-39). It was mapped by Norwegian cartographers from surveys and air photos by Norwegian-British-Swedish Antarctic Expedition (NBSAE) (1949-52) and named Tyskepasset (the German pass), presumedly because it was seen earlier by the German expedition.

Tyulen'i Islands
Tyulen'i Islands (-66.55°N, 92.95°W) is a group of about three very small islands in the south part of the Haswell Islands, located 1 nautical mile (1.9 km) off the mainland and 1.2 nautical miles (2.2 km) west of Mabus Point. The islands are aligned east-west and lie just west of Stroiteley Islands. Plotted by G.D. Blodgett (1955) from aerial photographs taken by U.S. Navy Operation Highjump (1946-47). Photographed by the Soviet Antarctic Expedition (1956) and named Ostrova Tyulen'i (seal islands). == See also == * List of antarctic and sub-antarctic islands

Tyuleniy Point
Tyuleniy Point (-70.73333°N, 11.6°W) is a rock point 0.5 nautical miles (0.9 km) west of Ozhidaniya Cove on the north side of the Schirmacher Hills, Queen Maud Land. First photographed from the air by the German Antarctic Expedition, 1938-39. Mapped by the Soviet Antarctic Expedition in 1961 and named Mys Tyuleniy (seal point).