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O'Brien Bay
O'Brien Bay (-66.3°N, 110.53333°W) is a bay lying between Bailey and Mitchell Peninsulas on the Budd Coast. First mapped from air photos taken by U.S. Navy Operation Highjump and Operation Windmill in 1947 and 1948. Named by the Advisory Committee on Antarctic Names (US-ACAN) for Lieutenant Clement E. O'Brien, U.S. Navy, communications officer with U.S. Navy Operation Windmill which established astronomical control stations in the Windmill Islands in 1948.

O'Brien Island
O'Brien Island (-61.5°N, -55.96667°W) is a small rocky island which rises to 540 m, lying 2 nautical miles (3.7 km) southwest of Aspland Island in the South Shetland Islands. The name dates back to at least 1822 and is now established in international usage. == See also == * List of antarctic and sub-antarctic islands

O'Brien Peak
O'Brien Peak (-85.46667°N, -156.7°W) is a rock peak, 670 m, standing 3 nautical miles (6 km) west of the north extremity of Medina Peaks, along the edge of the Ross Ice Shelf. Discovered in December 1929 by the Byrd Antarctic Expedition geological party under Laurence Gould, and named by Byrd for John S. O'Brien, surveyor with that party.

O'Cain Point
O'Cain Point (-62.26667°N, -58.88333°W) is a point lying 3 nautical miles (6 km) northwest of Duthoit Point on the east side of Nelson Island, in the South Shetland Islands. The name O'Cain's Island, after the American sealing vessel O'Cain (Captain Jonathan Winship) from Boston, MA, was applied by the Stonington sealers in 1820-21 to Nelson Island, but this name did not become established. O'Cain Point was applied by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1961 to preserve the American name in the area.

O'Connell Nunatak
O'Connell Nunatak (-84.71667°N, -65.13333°W) is a peaked rock nunatak, 1,210 m, standing 6 nautical miles (11 km) south-southeast of Mount Murch in southern Anderson Hills, in the 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 Richard V. O'Connell, seismologist at South Pole Station, winter 1967.

O'Connor Island
O'Connor Island (-66.41667°N, 110.46667°W) is a rocky island, 1 nautical mile (1.9 km) long, between Holl and Ford Islands in the south part of the Windmill Islands. First mapped from air photos taken by U.S. Navy Operation Highjump and Operation Windmill in 1947 and 1948. Named by the Advisory Committee on Antarctic Names (US-ACAN) for Joseph (Jerry) J. O'Connor, who served as air crewman with the eastern task group of U.S. Navy Operation Highjump, 1946-47, and assisted U.S. Navy Operation Windmill parties in establishing astronomical control stations between Wilhelm II Coast and Budd Coast during the 1947-48 season. == See also == * List of antarctic and sub-antarctic islands

O'Connor Nunataks
O'Connor Nunataks (-76.43333°N, -143.41667°W) is a group of rock exposures rising above the ice near the head of Balchen Glacier, 5 nautical miles (9 km) northeast of Griffith Nunataks in the Ford Ranges, Marie Byrd Land. Discovered by the United States Antarctic Service (USAS) in aerial flights over this area in 1940, and named for Raymond O'Connor, a member of the West Base of the USAS (1939-41).

O'Connor Peak
O'Connor Peak (-54.26667°N, -36.31667°W) is a peak, 675 m, standing west of Long Point on Barff Peninsula, South Georgia. Charted by a Norwegian Antarctic Expedition, 1927-28, and named Mount Bryde. Recharted by DI in 1929 and named after Midshipman W.P. O'Connor, Royal Navy Reserve, who assisted with the survey.

O'Connors Rock
O'Connors Rock (-62.08333°N, -58.4°W) is a rock 0.1 nautical miles (0.2 km) southwest of Stenhouse Bluff, King George Island, lying in Visca Anchorage in the north part of Admiralty Bay, in the South Shetland Islands. First charted by the French Antarctic Expedition, 1908-10, under Charcot. The name "O'Connor's Rock" was first used for this feature on a British chart and is probably after Midshipman W.P. O'Connor, Royal Navy Reserve, who assisted in a sketch survey of Visca Anchorage in the Discovery in 1927.

O'Donnell Peak
O'Donnell Peak (-72.4°N, 166.01667°W) is a peak on the polar plateau, situated 5 nautical miles (9 km) west of Joice Icefall of the Millen Range. 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 Frank B. O'Donnell, meteorologist at Hallett Station in 1962.

O'Dowd Cove
O'Dowd Cove (-72.5°N, -98.91667°W) is an ice-filled cove of Abbot Ice Shelf between Williamson Peninsula and Von der Wall Point on the south side of Thurston Island. Named by Advisory Committee on Antarctic Names (US-ACAN) after Commander William O'Dowd, Aviation Officer of the seaplane tender USS Pine Island in the Eastern Group of U.S. Navy Operation Highjump, 1946-47.

O'Gorman Rocks
O'Gorman Rocks (-68.56667°N, 77.95°W) is a two small insular rocks lying off the Vestfold Hills, about 0.5 nautical miles (0.9 km) south of Trigwell Island. The rocks were plotted from ANARE (Australian National Antarctic Research Expeditions) air photos of 1957 and 1958. Named by Antarctic Names Committee of Australia (ANCA) for M. O'Gorman, weather observer at Davis Station in 1959.

O'Hara Glacier
O'Hara Glacier (-70.81667°N, 166.66667°W) is a glacier just west of Ackroyd Point, flowing northwest into the south side of Yule Bay, Victoria Land. 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 Norbert W. O'Hara, a member of the United States Antarctic Research Program (USARP) party which conducted studies of the Ross Ice Shelf, 1965-66.

O'Kane Canyon
O'Kane Canyon (-74.31667°N, 162.5°W) is a steep-walled canyon at the head of O'Kane Glacier, indenting the east side of Eisenhower Range between Mount Baxter and Eskimo Point, in Victoria Land. Named by the Southern Party of New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1962-63, for H.D. O'Kane, photographer at Scott Base, 1961-62. O'Kane had made several reconnaissance flights to provide aerial photographs of the area.

O'Kane Glacier
O'Kane Glacier (-74.43333°N, 163.1°W) is a steep glacier, 15 nautical miles (28 km) long, draining the east wall of Eisenhower Range between Mount Baxter and Eskimo Point and flowing southeast to its terminus opposite the mouths of the Priestley and Corner Glaciers at the north extremity of Nansen Ice Sheet, in Victoria Land. Named by Advisory Committee on Antarctic Names (US-ACAN) in association with O'Kane Canyon, located at the head of the glacier.

O'Keefe Hill
O'Keefe Hill (-70.33333°N, 64.4°W) is an isolated ice-covered hill, located 1.5 nautical miles (2.8 km) south of Baldwin Nunatak and 8 nautical miles (15 km) south-southwest of Mount Starlight in the Prince Charles Mountains. Mapped from ANARE (Australian National Antarctic Research Expeditions) air photos, 1965. Named by Antarctic Names Committee of Australia (ANCA) for J. O'Keefe, cook at Mawson Station, 1964.

O'Leary Peak
O'Leary Peak (-84.45°N, -179.23333°W) is a partly snow-covered peak (1,040 m), the northernmost summit along the east wall of Erickson Glacier, where the latter enters the Ross Ice Shelf. Discovered and photographed by the United States Antarctic Service (USAS), 1939-41. Named by Advisory Committee on Antarctic Names (US-ACAN) for Paul V. O'Leary, builder, U.S. Navy Reserve, a member of the U.S. Naval Support Force, Antarctica, who lost his life by accidental poisoning on November 28, 1959.

O'Leary Ridges
O'Leary Ridges (-70.96667°N, 67.31667°W) is a three partly snow-covered ridges extending in a line NW-SE for about 5 nautical miles (9 km), situated 20 nautical miles (37 km) southeast of Mount Bunt in the Prince Charles Mountains. Plotted from ANARE (Australian National Antarctic Research Expeditions) air photos taken in 1960. Named by Antarctic Names Committee of Australia (ANCA) for R.A. O'Leary, officer in charge at Wilkes Station in 1964.

O'Neal Nunataks
O'Neal Nunataks (-79.01667°N, -85°W) is a small, linear group of nunataks that mark the south end of Bastien Range, in the Ellsworth Mountains. Named by the University of Minnesota geological parties to the Ellsworth Mountains for Jerry O'Neal, aerographer with these parties in 1963-64 and 1964-65.

O'Neal Point
O'Neal Point (-64.7°N, -62.3°W) is a point on the east side of Arctowski Peninsula, Danco Coast. The point stands between the entrances of Beaupre Cove and Piccard Cove in Wilhelmina Bay. Named after James D. O'Neal, cartographer, Special Maps Branch, U.S. Geological Survey, who was United States Observer with the Chilean Antarctic Expedition, October 1956-April 1957, working in the South Shetland Islands and northwestern Antarctic Peninsula.

O'Neal Ridge
O'Neal Ridge (-72.8°N, 168.75°W) is a high ridge trending NE-SW, bounded by Ingham Glacier and Humphries Glacier in the Victory Mountains of Victoria Land. Named by Advisory Committee on Antarctic Names (US-ACAN) for Russell D. O'Neal, member of the National Science Board, 1972-77. As part of his official duties in support of the U.S. science program, he visited several sites in Antarctica in 1975.

Mount O'Neil
Mount O'Neil (-85.66667°N, -136.33333°W) is a mountain, 2,090 m, just northeast of Mount Ratliff at the north side of Kansas Glacier. Mapped by United States Geological Survey (USGS) from ground surveys and U.S. Navy air photos, 1960-63. Named by Advisory Committee on Antarctic Names (US-ACAN) for Robert J. O'Neil, utilitiesman with the Byrd Station winter party in 1961.

O'Neill Peak
O'Neill Peak (-74.08333°N, -77.23333°W) is the highest point (about 850 m) of FitzGerald Bluffs, on the English Coast, Ellsworth Land. Following geological work in the area by a United States Geological Survey (USGS) field party in December 1984, named by Advisory Committee on Antarctic Names (US-ACAN) after John M. O'Neill, USGS geologist, a member of the field party.

O'Neill Point
O'Neill Point (-64.81667°N, -63.1°W) is the north point of Lautaro Island, lying 1.5 nautical miles (2.8 km) west-southwest of Lemaire Island in Gerlache Strait. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) in 1977 for Vincent Michael O'Neill, Falkland Islands Dependencies Survey (FIDS) radio operator and mechanic at Danco Island, 1957-58, and Deception Island, 1958-59.

O'Shea Peak
O'Shea Peak (-70.43333°N, 66.51667°W) is a small peak just south of Mount McCarthy in the eastern part of the Porthos Range, Prince Charles Mountains. Plotted from ANARE (Australian National Antarctic Research Expeditions) air photos taken in 1956 and 1960. Named for J.H. O'Shea, radio officer at Wilkes Station in 1962 and 1964 and at Macquarie Island in 1966.

Mount O'Shea
Mount O'Shea (-70.25°N, 65.58333°W) is a mountain 2 nautical miles (3.7 km) north-northwest of Mount Albion in the Athos Range, Prince Charles Mountains. Plotted from ANARE (Australian National Antarctic Research Expeditions) air photos. Named for A.J. O'Shea, assistant diesel mechanic at Mawson Station in 1964.

O'Sullivan Peak
O'Sullivan Peak (-71.43333°N, -62.1°W) is an ice-covered peak, 1,765 m, which forms the highest point and is near the south end of a north-south trending ice-covered ridge, standing 11 nautical miles (20 km) west of the north arm of Odom Inlet, on the east coast of Palmer Land. The peak was photographed from the air by the United States Antarctic Service (USAS) in December 1940, and was probably seen by the expedition's ground party that explored this coast. First charted by a joint party consisting of members of the Ronne Antarctic Research Expedition (RARE) and the Falkland Islands Dependencies Survey (FIDS) in 1947. Named by the FIDS for T.P. O'Sullivan, a member of the FIDS at the Hope Bay base in 1946-47.

Lake O-ike
Lake O-ike (-69.01667°N, 39.56667°W) is a lake just southeast of Showa Flat in the east extremity of Ongul Island. Mapped from surveys and air photos by Japanese Antarctic Research Expedition (JARE), 1957-62, and named O-ike (big pond) because it is the largest lake on the island.

Cape Oakeley
Cape Oakeley (-71.01667°N, 167.9°W) is a bold headland on the northeast side of Quam Heights. It forms the south side of the entrance of Smith Inlet in northern Victoria Land. Discovered in 1841 by Captain James Ross, Royal Navy, who named it for Henry Oakeley, mate on the Erebus.

Oakley Glacier
Oakley Glacier (-73.7°N, 166.13333°W) is a glacier in the Mountaineer Range that descends east from Mount Casey to merge with the floating tongue from the Icebreaker Glacier at Lady Newnes Bay, in 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 Lieutenant Commander Donald C. Oakley, U.S. Navy, Protestant chaplain with the winter party at McMurdo Station, 1967.

Oamaru Peak
Oamaru Peak (-77.46667°N, 167.9°W) is a peak 2 nautical miles (3.7 km) north of Mount Terra Nova on Ross Island. The feature rises to c.1000 m 1 nautical mile (1.9 km) north of Caldwell Peak. Named by New Zealand Geographic Board (NZGB) (2000) after Oamaru, Otago, New Zealand, the port the Terra Nova first visited after the death of Captain Robert F. Scott.

Oates Bank
Oates Bank (-70.25°N, 165°W) is a bank name proposed by Dr. Steven C. Cande, Scripps Institution of Oceanography. Named in association with Oates Coast. Name approved 9/97 (ACUF 272).

Oates Canyon
Oates Canyon (-68°N, 164.5°W) is an undersea canyon on the continental rise east of Iselin Bank named in association with Oates Coast. Name approved 6/88 (ACUF 228).

Oates Coast
Oates Coast (-69.5°N, 159°W) is that portion of the coast of Antarctica between Cape Hudson and Cape Williams. The eastern portion of this coast was discovered in February 1911 by Lieutenant Harry Pennell, Royal Navy, commander of the expedition ship Terra Nova during the British Antarctic Expedition, 1910-13. He named the coast after Captain Lawrence E.G. Oates who, with Captain Robert F. Scott and three British Antarctic Expedition companions, perished on the return journey from the South Pole in 1912. The western portion of the coast, the vicinity of the Mawson Peninsula, was first delineated from air photos taken by U.S. Navy Operation Highjump, 1946-47.

Oates Piedmont Glacier
Oates Piedmont Glacier (-76.41667°N, 162.58333°W) is an extensive lowland ice sheet east of the Kirkwood Range, occupying the whole of the coastal platform between the Fry and Mawson Glaciers in Victoria Land. Surveyed in 1957 and named by the New Zealand Northern Survey Party of the Commonwealth Trans-Antarctic Expedition (1956-58) after Captain Lawrence E.G. Oates who, with Captain Scott and three companions, perished on the return from the South Pole in 1912.

Ob' Bay
Ob' Bay (-70.58333°N, 163.36667°W) is a bay lying between Lunik Point and Cape Williams. Lillie Glacier Tongue occupies the east part of the bay. Charted by the Soviet Antarctic Expedition (1958) and named after the expedition ship Ob'.

Ob' Passage
Ob' Passage (-66.55°N, 93.01667°W) is a passage 0.4 nautical miles (0.7 km) wide between Khmary Island and Mabus Point on the coast of Antarctica. First observed by the Australasian Antarctic Expedition (1911-14) under Mawson. Mapped by the Soviet expedition (1956), who named it for the ship Ob'.

Obelisk Col
Obelisk Col (-64.11667°N, -58.4°W) is a col at about 150 m on the east side of Cape Obelisk, James Ross Island, aligned north-south between Rum Cove and Rohss Bay. Named after Cape Obelisk by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1983.

Obelisk Mountain
Obelisk Mountain (-77.61667°N, 161.61667°W) is a mountain, about 2,200 m, between Catspaw Glacier and Mount Odin in the Asgard Range of Victoria Land. Given this descriptive name by the Western Journey Party, led by Taylor, of the British Antarctic Expedition, 1910-13.

Cape Obelisk
Cape Obelisk (-64.13333°N, -58.45°W) is a cape at the north side of the entrance to Rohss Bay, on the west side of James Ross Island. Discovered and named by the Swedish Antarctic Expedition, 1901-04, under Nordenskjold. The name is descriptive of a conspicuous rock pinnacle about 2 nautical miles (3.7 km) within the headland, which is visible from northwestward and southward.

The Obelisk
The Obelisk (-71.83333°N, -70.55°W) is a prominent pillar, 750 m, centrally located within Staccato Peaks, 18 nautical miles (33 km) west-northwest of Mimas Peak in the south part of Alexander Island. First seen from the air by Lincoln Ellsworth on November 23, 1935, and roughly mapped from photos taken on that flight by W.L.G. Joerg. Remapped from air photos taken by the Ronne Antarctic Research Expedition (RARE), 1947-48, by Searle of the Falkland Islands Dependencies Survey (FIDS) in 1960. Name given by the United Kingdom Antarctic Place-Names Committee (UK-APC) is descriptive.

Lake Ober-See
Lake Ober-See (-71.28333°N, 13.65°W) is a meltwater lake lying between Sjoneset Spur and Mount Seekopf in the Gruber Mountains of Queen Maud Land. Discovered by the German Antarctic Expedition under Ritscher, 1938-39, who named it Ober-See (upper lake).

Oberon Peak
Oberon Peak (-71.4°N, -69.53333°W) is an isolated nunatak, 1,250 m, at the head of Uranus Glacier and 8 nautical miles (15 km) north-northwest of Titania Peak 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) for its association with Uranus Glacier, Oberon being one of the satellites of Uranus.

Oberst Glacier
Oberst Glacier (-72.05°N, 27.06667°W) is a glacier draining the west side of Balchen Mountain 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 Oberstbreen (the colonel glacier) because of its association with Balchen Mountain. Bernt Balchen, a famous Norwegian polar aviator, achieved the rank of colonel in the U.S. Army Air Force in World War II.

Mount Obiglio
Mount Obiglio (-74.45°N, -131.83333°W) is a moderate rock summit (510 m) in the west-central portion of Grant Island, along the edge of the Getz Ice Shelf, coastal Marie Byrd Land. Discovered and charted from the USS 1961-62. Named by Advisory Committee on Antarctic Names (US-ACAN) for Lieutenant G.M. Obiglio, Argentine naval observer aboard Glacier, at the suggestion of the Task Unit Commander, Captain Edwin A. McDonald, USN.

Oblachnaya Nunatak
Oblachnaya Nunatak (-67.68333°N, 51.26667°W) is a nunatak lying 6 nautical miles (11 km) southeast of Perov Nunataks, at the east margin of Scott Mountains in Enderby Land. The geology of the nunatak was investigated by the Soviet Antarctic Expedition, 1961-62, which called it "Gora Oblachnaya" (cloudy mountain).

Obrecht Pyramid
Obrecht Pyramid (-68.15°N, -65.53333°W) is a pyramidal peak (about 600 m) on the north shore of Joerg Peninsula, Bowman Coast. The peak was photographed from the air by the United States Antarctic Service (USAS), 1940, and was surveyed by Falkland Islands Dependencies Survey (FIDS), 1946-48. The name "Punta Alberto Obrecht" after Alberto Obrecht, former Director of the Chilean Astronomical Observatory and a member of the Comision Antartica Chilena of 1906, was applied to this feature on a Chilean hydrographic chart of 1947. An amended form of the original name has been approved.

Obruchev Hills
Obruchev Hills (-66.58333°N, 99.76667°W) is a group of rounded hills on the coast between Denman Glacier and Scott Glacier. The hills were plotted by the Western Base Party of the Australasian Antarctic Expedition (1911-14) as a great rock face. They were plotted in greater detail from aerial photographs taken by U.S. Navy Operation Highjump (1946-47) and later by the Soviet expedition (1956). Named by the latter for Vladimir A. Obruchev, Soviet geologist (1863-1956).

Mount Obruchev
Mount Obruchev (-68.9°N, 154.16667°W) is a mountain 15 nautical miles (28 km) east-southeast of Scar Bluffs, near the base of Mawson Peninsula. Mapped by the Soviet Antarctic Expedition, 1958, and named for Soviet geologist V.A. Obruchev.

Observation Bluff
Observation Bluff (-60.71667°N, -45.6°W) is the eastern summit, 110 m, of the ice-free ridge which forms the north side of Paal Harbor in Signy Island, in the South Orkney Islands. The area was roughly surveyed by DI personnel in 1933. The bluff was surveyed in 1947 by the Falkland Islands Dependencies Survey (FIDS), and so named by them because it marks the position from which daily sea ice observations were made.

Observation Hill
Observation Hill (-77.85°N, 166.66667°W) is a conical hill, 230 m, surmounting Cape Armitage at the south end of Hut Point Peninsula on Ross Island. Discovered by the Discovery expedition, 1901-04, under Scott, and so named because it forms an excellent lookout station.

Observation Island
Observation Island (-67.01667°N, 50.4°W) is a small irregular island lying just west of the mouth of Beaver Glacier in the east part of Amundsen Bay. Visited in 1956 by an ANARE (Australian National Antarctic Research Expeditions) party led by P.W. Crohn, and so named because the island was occupied as a magnetic and astronomical observation station. == See also == * List of antarctic and sub-antarctic islands

Ocean Harbor
Ocean Harbor (-54.33333°N, -36.26667°W) is a deeply indented bay on the north coast of South Georgia which is entered 1.5 nautical miles (2.8 km) west-northwest of Tijuca point. The names New Fortune Bay and Neufortuna Bay, probably for the Fortuna, Norwegian-Argentine whaling vessel which participated in establishing the first permanent whaling station at Grytviken, South Georgia in 1904-05, were used for this feature in 1922 by Filchner, following the German Antarctic Expedition, 1911-12. Following a survey of the island in 1951-52, the SGS reported that the feature is known to whalers and sealers as Ocean Harbor, a name derived from the Ocean Whaling Co. which at one time had a station there. The name Ocean Harbor is approved for this feature on the basis of local usage, and also to avoid confusion of the name New Fortuna Bay with Fortuna Bay, only 22 nautical miles (41 km) to the northwest.

Oceana Nunatak
Oceana Nunatak (-65.13333°N, -59.8°W) is an one of the Seal Nunataks, lying at the northwest corner of Robertson Island, off the east coast of Antarctic Peninsula. Discovered by a Norwegian whaling expedition under C.A. Larsen in December 1893, and named after the Oceana Co. of Hamburg, a sponsor of the expedition.

Mount Oceanite
Mount Oceanite (-58.48333°N, -26.25°W) is a conspicuous ice-covered mountain (probably an extinct volcano) rising to 915 m in the extreme southeast corner of Montagu Island, South Sandwich Islands. The name applied by United Kingdom Antarctic Place-Names Committee (UK-APC) in 1971 refers to the oceanite lavas present in this area, which occur nowhere else in the South Sandwich Islands.

Mount Ochre
Mount Ochre (-78.23333°N, 166.55°W) is a volcanic crater, partly eroded away, lying 3 nautical miles (6 km) east of Mount Aurora on Black Island, in the Ross Archipelago. So named by the New Zealand Geological Survey Antarctic Expedition (NZGSAE) (1958-59) because reddish-brown scoria covers much of the upper slopes.

Ochs Glacier
Ochs Glacier (-76.5°N, -145.58333°W) is a glacier flowing to the head of Block Bay between Mount Iphigene and Mount Avers, in the Ford Ranges of Marie Byrd Land. Discovered by the Byrd Antarctic Expedition in 1929, and named for Adolph S. Ochs, publisher of the New York Times, a patron of the expedition.

Ocoa Point
Ocoa Point (-62.61667°N, -61.15°W) is a steep headland backed by raised beach terraces at the head of New Plymouth, Byers Peninsula, Livingston Island. The feature is named "Punta Ocoa" in a report by P.J. Hernandez P. and V. Azcarate M., 1971, following geological work by the Chilean Antarctic Expedition. Presumably named for a member of the expedition.

Odbert Island
Odbert Island (-66.36667°N, 110.55°W) is a rocky island, 1.5 nautical miles (2.8 km) long, between Ardery Island and Robinson Ridge in the Windmill Islands. First mapped from air photos taken by U.S. Navy Operation Highjump and Operation Windmill in 1947 and 1948. Named by the Advisory Committee on Antarctic Names (US-ACAN) for Lieutenant Jack A. Odbert, U.S. Navy, assistant aerological officer with U.S. Navy Operation Windmill which established astronomical control stations in the area in January 1948. == See also == * List of antarctic and sub-antarctic islands

Odde Nunatak
Odde Nunatak (-72.03333°N, 10.71667°W) is the northernmost of a small chain of nunataks at the east side of Glopeflya Plain, close south of the east part of the Orvin Mountains in Queen Maud Land. Mapped by Norwegian cartographers from surveys and air photos by the Norwegian Antarctic Expedition (1956-60) and named for Odde Gjeruldsen, scientific assistant with Norwegian Antarctic Expedition (1956-58).

Odell Glacier
Odell Glacier (-76.73333°N, 159.91667°W) is a glacier draining northeast between Allan Hills and Coombs Hills into the upper Mawson Glacier in Victoria Land. Named by the New Zealand Antarctic Place-Names Committee (NZ-APC) for Professor N.E. Odell, formerly of Otago University, New Zealand.

Odin Glacier
Odin Glacier (-77.58333°N, 161.6°W) is a small glacier that drains the west slopes of Mount Odin in the Asgard Range, Victoria Land. Named by New Zealand Antarctic Place-Names Committee (NZ-APC) in association with Mount Odin.

Odin Valley
Odin Valley (-77.6°N, 161.71667°W) is an ice free valley immediately east of Mount Odin in the Asgard Range, Victoria Land. Named by New Zealand Antarctic Place-Names Committee (NZ-APC) in association with Mount Odin.

Mount Odin
Mount Odin (-66.43333°N, -64.05°W) is a saddle-top mountain consisting of two ice-covered peaks, 1,465 m, situated close southwest of Frigga Peak on the divide between Anderson and Sleipnir Glaciers, on the east coast of Graham Land. During 1947 the peak was photographed from the air by the Ronne Antarctic Research Expedition (RARE) and charted from the ground by the Falkland Islands Dependencies Survey (FIDS). Named by the FIDS after the Norse god Odin, the mythological husband of Frigga.

Mount Odin
Mount Odin (-77.58333°N, 161.65°W) is the most prominent, though not the highest peak in the Asgard Range, rising over 2,000 m just south of Lake Vanda in Victoria Land. Named by the Victoria University of Wellington Antarctic Expedition (VUWAE) (1958-59) for one of the Norse gods.

Odinokaya Nunatak
Odinokaya Nunatak (-71.53333°N, 6.16667°W) is a small, isolated nunatak about 15 nautical miles (28 km) northwest of the Jaren Crags, Muhlig-Hofmann Mountains, in Queen Maud Land. Mapped by Norsk Polarinstitutt from surveys and air photos by Norwegian Antarctic Expedition, 1956-60. Also mapped by the Soviet Antarctic Expedition in 1961 and named Gora Odinokaya (solitary hill).

Mount Odishaw
Mount Odishaw (-84.7°N, 174.9°W) is a high, prominent mountain, 3,965 m, forming a distinctive landmark 9 nautical miles (17 km) south-southwest of Mount Kaplan, in the Hughes Range. Discovered and photographed by R. Admiral Byrd on the Baselaying Flight of November 18, 1929, and surveyed by A.P. Crary in 1957-58. Named by the latter for Hugh Odishaw, Executive Secretary of the U.S. National Committee for the IGY.

Odom Inlet
Odom Inlet (-71.5°N, -61.33333°W) is an ice-filled inlet 9 nautical miles (17 km) long, between Cape Howard and Cape MacDonald along the east coast of Palmer Land. Discovered by members of the United States Antarctic Service (USAS) who explored this coast from East Base both by land and from the air in 1940. Named for Howard Odom, radio operator at the East Base.

Oehlenschlager Bluff
Oehlenschlager Bluff (-75.05°N, -136.7°W) is a steep rock bluff overlooking Hull Glacier from the north. It marks the southwest extremity of Erickson Bluffs and McDonald Heights in 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 Richard J. Oehlenschlager, member of the biological party that made population studies of seals, whales, and birds in the pack ice of the Bellingshausen and Amundsen Seas using USCGC Southwind and its two helicopters, 1971-72.

Oeschger Bluff
Oeschger Bluff (-76.4°N, -111.8°W) is a flat-topped snow and rock bluff that projects from the southeast part of Mount Takahe in Marie Byrd Land. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy tricamera aerial photography, 1959-66. Named by Advisory Committee on Antarctic Names (US-ACAN) for Hans Oeschger (University of Bern, Switzerland), United States Antarctic Research Program (USARP) glaciologist at Byrd Station, 1968-69 and 1969-70.

The Office Boys
The Office Boys (-55.01667°N, -34.65°W) is a group of rocks at the northeast end of the Clerke Rocks, lying some 40 nautical miles (70 km) east-southeast of the southeast end of South Georgia. Clerke Rocks were discovered by Captain James Cook in 1775. The Office Boys were charted and probably named by DI personnel who made surveys in the South Georgia area in the period 1926-30.

The Office Girls
The Office Girls (-72.33333°N, 160.01667°W) is a two prominent rock nunataks along an ice cliff, situated 7 nautical miles (13 km) southwest of Welcome Mountain in the Outback Nunataks. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1959-64. Named by Advisory Committee on Antarctic Names (US-ACAN) to express appreciation for the dedicated support provided to Antarctic programs by home-based personnel.

Offset Ridge
Offset Ridge (-71.68333°N, -68.53333°W) is a ridge extending west from Triton Point between Venus Glacier and Neptune Glacier in eastern Alexander Island. Mapped by Directorate of Overseas Surveys from satellite imagery by U.S. National Aeronautics and Space Administration in cooperation with U.S. Geological Survey. The ridge is kinked in the middle and is effectively formed of two ridges offset from one another; thus, the descriptive name applied by United Kingdom Antarctic Place-Names Committee (UK-APC).

Ogden Heights
Ogden Heights (-73.96667°N, 161.66667°W) is a flattish, mainly ice-covered heights, about 7 nautical miles (13 km) long, forming a part of the south wall of upper Priestley Glacier to the southeast of Tantalus Peak, Victoria Land. The heights are near where the southern party of the New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1962-63, was landed. Named by them for Lieutenant John H. Ogden, U.S. Navy, pilot who airlifted the party to this point, flew in their resupply, and later flew the party back to base at the end of the season.

Ogi Beach
Ogi Beach (-69.13333°N, 39.43333°W) is a beach at the head of the cove in southern Rumpa Island, in the eastern part of Lutzow-Holm Bay. Mapped by the Japanese Antarctic Research Expedition (JARE). The name Ogi-hama (Oogi Hama), meaning "fan beach," was applied by JARE Headquarters in 1973.

Ohau Peak
Ohau Peak (-77.5°N, 168.7°W) is a sharp rock peak 1.9 nautical miles (3.5 km) northeast of the summit of Mount Terror on Ross Island. The feature rises to c.2400 m and is central in three aligned summits 0.8 nautical miles (1.5 km) north of Mount McIntosh. Named by New Zealand Geographic Board (NZGB) (2000) after a peak near the locality of Tekapo (Tekapo Ridge, q.v.), New Zealand.

Ohio Range
Ohio Range (-84.75°N, -114°W) is a range about 30 nautical miles (60 km) long and 10 nautical miles (18 km) wide, extending WSW-ENE from Eldridge Peak to Mirsky Ledge. The range forms the northeast end of the Horlick Mountains and consists primarily of a large snow-topped plateau with steep northern cliffs and several flat-topped ridges and mountains. The highest point, 2,990 m, is the summit of Mount Schopf. The range was surveyed in 1958-59 by the United States Antarctic Research Program (USARP) Horlick Mountains Traverse, and was investigated in 1960-61 and 1961-62 by geologists of the Institute of Polar Studies of Ohio State University, for which the range is named.

Ohlin Island
Ohlin Island (-63.5°N, -60.11667°W) is an island lying 6 nautical miles (11 km) west of the north end of Tower Island in the Palmer Archipelago. Discovered by the Swedish Antarctic Expedition, 1901-04, and named by Nordenskjold for Axel Ohlin, zoologist with the expedition. == See also == * List of antarctic and sub-antarctic islands

Mount Ohridsky
Mount Ohridsky (-69.51667°N, -71.5°W) is an ice-covered mountain rising to about 1,500 m, 5 nautical miles (9 km) south of Mount Braun, in the south part of Sofia Mountains, Alexander Island. The name results from geological work in the area in February 1988 by a field party composed of members of British Antarctic Survey (BAS) and the first Bulgarian Antarctic Expedition. Named after Kliment Ohridsky (Okhridsky), Bulgarian scholar, whose name is officially associated with the University of Sofia.

Mount Ojakangas
Mount Ojakangas (-77.6°N, -86.25°W) is an elongated mountain rising to about 2,450 m, 2 nautical miles (3.7 km) northwest of Mount Washburn in the north part of the Sentinel Range, Ellsworth Mountains. Named by Advisory Committee on Antarctic Names (US-ACAN) in 1982 after Richard Ojakangas, Professor of Geology, University of Minnesota, Duluth, a member of the United States Antarctic Research Program (USARP) Ellsworth Mountains Expedition, 1979-80.

Okskaya Nunatak
Okskaya Nunatak (-71.96667°N, 13.78333°W) is an elongated nunatak, 2,295 m, at the north end of Rimekalvane Nunataks in the Weyprecht Mountains, Queen Maud Land. Discovered and plotted from air photos by German Antarctic Expedition, 1938-39. Mapped from air photos and surveys by Norwegian Antarctic Expedition, 1956-60; remapped by Soviet Antarctic Expedition, 1960-61, and named presumedly after the river Oka.

Oku-hyoga Rock
Oku-hyoga Rock (-70.1°N, 39.01667°W) is a rock which is the farthest south bare rock exposed along the east side of Shirase Glacier, in Queen Maud Land Mapped from surveys and air photos by Japanese Antarctic Research Expedition (JARE) 1957-62, and named Oku-hyoga-iwa (inner glacier rock) because of its position.

Oku-iwa Glacier
Oku-iwa Glacier (-68.7°N, 40.76667°W) is a glacier flowing to the sea just west of Oku-iwa Rock on the coast of Queen Maud Land. Mapped from surveys and air photos by Japanese Antarctic Research Expedition (JARE), 1957-62, and named after nearby Oku-iwa Rock.

Oku-iwa Rock
Oku-iwa Rock (-68.7°N, 40.83333°W) is a substantial rock exposure just east of Oku-iwa Glacier on the coast of Queen Maud Land. Mapped from surveys and air photos by Japanese Antarctic Research Expedition (JARE), 1957-62, and named Oku-iwa (interior rock). The name presumably suggests the interior position of the rock with respect to the minor recession of the coast along which the rock is located.

Okuma Bay
Okuma Bay (-77.83333°N, -158.33333°W) is a bay indenting the front of Ross Ice Shelf at its juncture with Edward VII Peninsula. It was discovered by the Discovery expedition under Scott in 1902. Named by the Japanese Antarctic Expedition under Lieutenant Nobu Shirase (1911-12) after Count Shigenobu Okuma (1838-1922), Premier of Japan.

Olander Nunatak
Olander Nunatak (-74.41667°N, -72.11667°W) is an one of several somewhat scattered nunataks which rise above the ice of eastern Ellsworth Land, lying 5 nautical miles (9 km) east of Tollefson Nunatak and 27 nautical miles (50 km) north-northwest of Sky-Hi Nunataks. 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 R.E. Olander, electronics technician at Eights Station in 1963.

Olav Peak
Olav Peak (-54.41667°N, 3.41667°W) is a snow-covered peak (780 m) which stands 1.5 nautical miles (2.8 km) south of Cape Valdivia and surmounts the north-central part of Bouvetoya. The recommended name was applied in December 1927 by the Norvegia expedition under Captain Harald Horntvedt. Although the name "Kaiser Wilhelm Pik" appears on the chart of the German Valdivia expedition of 1898 as applying to this peak, the accompanying expedition report indicates that name is intended for the entire summit area of the island, not this single peak.

Olav Rocks
Olav Rocks (-54.05°N, -37.11667°W) is a small group of rocks lying 0.6 nautical miles (1.1 km) east-southeast of Cape Crewe off the north coast of South Georgia. Charted by DI personnel during the period 1927-30, and so named because the rocks serve as a guide to vessels entering Prince Olav Harbor. The incorrect spelling, "Prince Olaf Rocks," appearing on the charts by DI personnel has been corrected. A shortened form of the original name is approved.

The Old Man
The Old Man (-54.06667°N, -37.13333°W) is a point lying between Squire and Sheep Points in Cook Bay, South Georgia. The name appears on a 1938 British Admiralty chart.

Old Mans Head
Old Mans Head (-72.36667°N, -60.75°W) is a dark headland marking the south side of the entrance to Wust Inlet, on the east coast of Palmer Land. Discovered and photographed from the air in December 1940 by members of the United States Antarctic Service (USAS). During 1947 the headland was photographed from the air by the Ronne Antarctic Research Expedition (RARE), who in conjunction with the Falkland Islands Dependencies Survey (FIDS) charted it from the ground. This descriptive name was given by the FIDS.

Mount Oldenburg
Mount Oldenburg (-82.06667°N, -87.91667°W) is a partly snow-covered peak 0.5 nautical miles (0.9 km) east of Mount Helms in the east part of Martin Hills. The peak was sketched by J. Campbell Craddock in January 1963. Named by Advisory Committee on Antarctic Names (US-ACAN) for Margaret Oldenburg, who has been interested in polar exploration and research for a number of years, and who is well known to polar workers because of her gifts of books, photographs and other materials to isolated IGY and Weather Bureau stations. Application of the name was suggested by a number of persons including Edward C. Thiel who, with J. Campbell Craddock, conducted an airlifted geophysical traverse along the 88th meridian near this feature in 1959-60.

Mount Oldfield
Mount Oldfield (-66.83333°N, 50.63333°W) is a coastal mountain at the east side of Amundsen Bay, standing close west of Mount Hardy in the Tula Mountains. Photographed and mapped by ANARE (Australian National Antarctic Research Expeditions) in 1956. Visited and positioned by G.A. Knuckey of ANARE in November 1958. Named by Antarctic Names Committee of Australia (ANCA) for R.E.T. Oldfield, radio officer at Mawson Station in 1958. Site of camp occupied by G. Knuckey, I. McLeod and R. E. Oldfield November 1958.

Oldham Island
Oldham Island (-67.53333°N, 61.7°W) is an island in the east part of the Stanton Group, off Mac. Robertson Land. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition, 1936-37, and named Andoya (duck island). Renamed by Antarctic Names Committee of Australia (ANCA) for Hugh Oldham, biologist and magnetician at Mawson Station in 1955. == See also == * List of antarctic and sub-antarctic islands

Oldroyd Island
Oldroyd Island (-68.53333°N, 77.9°W) is a small island 0.2 nautical miles (0.4 km) northwest of Magnetic Island, lying off the Vestfold Hills in the east part of Prydz Bay. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition, 1936-37. Remapped by ANARE (Australian National Antarctic Research Expeditions) (1957-58) and named by Antarctic Names Committee of Australia (ANCA) for K.C. Oldroyd, weather observer at Davis Station in 1960. == See also == * List of antarctic and sub-antarctic islands

Olds Peak
Olds Peak (-84.66667°N, -174.68333°W) is a peak (1,480 m) standing 6 nautical miles (11 km) northeast of Mount Kenney in the south part of Longhorn Spurs, Queen Maud Mountains. Named by Advisory Committee on Antarctic Names (US-ACAN) for Commander Corwin A. Olds, U.S. Navy, who participated in Antarctic Support Activity during U.S. Navy Operation Deepfreeze 1964.

Olentangy Glacier
Olentangy Glacier (-86°N, -127.33333°W) is a glacier draining that portion of the Wisconsin Plateau of the Horlick Mountains that stands east-northeast of Sisco Mesa, flowing south to merge into McCarthy Glacier and the larger Reedy Glacier to the southwest of Mount McNaughton. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1960-64. The name was proposed by the Ohio State University geological party to the Horlick Mountains, 1964-65. The Olentangy River flows through the University campus.

Oliphant Islands
Oliphant Islands (-60.75°N, -45.6°W) is a group of small ice-free islands and rocks lying south of Gourlay Peninsula, the southeast extremity of Signy Island in the South Orkney Islands. Dove Channel extends through this group in a general east-west direction. The group was roughly charted in 1912-13 by Petter Sorlle, Norwegian whaling captain, and again in 1933 by DI personnel. Surveyed in 1947 by the Falkland Islands Dependencies Survey (FIDS) and named by them for Professor Marcus L.E. Oliphant, then professor of physics, Birmingham University; later director of the Research School of Physical Sciences, Australian National University, who gave assistance to the FIDS in obtaining equipment. == See also == * List of antarctic and sub-antarctic islands

Oliver Glacier
Oliver Glacier (-82.56667°N, 163.75°W) is a glacier draining the area west and south of Mount Christchurch and entering Lowery Glacier just north of the Taylor Hills. Mapped by the United States Geological Survey (USGS) from tellurometer surveys and Navy air photos, 1960-62. Named by Advisory Committee on Antarctic Names (US-ACAN) for Edward J. Oliver, United States Antarctic Research Program (USARP) glaciologist at South Pole Station, 1961-62.

Oliver Island
Oliver Island (-69.31667°N, -68.61667°W) is the largest of the Mica Islands, lying outside the entrance to West Bay and 6 nautical miles (11 km) northeast of Cape Jeremy in south Marguerite Bay. Named by Advisory Committee on Antarctic Names (US-ACAN) in 1977 for David L. Oliver, CS1, U.S. Navy, cook, Palmer Station, winter party 1972. == See also == * List of antarctic and sub-antarctic islands

Oliver Nunatak
Oliver Nunatak (-84.08333°N, -66.13333°W) is an one of the Rambo Nunataks, lying 2 nautical miles (3.7 km) south of Sowle Nunatak on the west side of Foundation Ice Stream, in the 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 Thomas H. Oliver, electronics technician at Plateau Station, winter 1967.

Oliver Peak
Oliver Peak (-77.61667°N, 161.05°W) is a prominent peak (2,410 m) located 4 nautical miles (7 km) north-northwest of Round Mountain in the Asgard Range, Victoria Land. Named by Advisory Committee on Antarctic Names (US-ACAN) for Leon Oliver of New Zealand, who participated in the international Dry Valley Drilling Project as chief driller (1973-74) and drilling superintendent (1974-75).

Mount Oliver
Mount Oliver (-84.93333°N, -173.73333°W) is a peak over 3,800 m, standing 2 nautical miles (3.7 km) southeast of Mount Campbell in the Prince Olav Mountains. Discovered and photographed by the United States Antarctic Service (USAS), 1939-41. Surveyed by A.P. Crary (1957-58) and named by him for Norman Oliver, Air Force Cambridge Research Center, who was Antarctic Project Leader for aurora operations, 1957-60.

Olivine Point
Olivine Point (-60.66667°N, -45.48333°W) is the southern end of the low-lying peninsula which forms the east limit of Iceberg Bay on the south coast of Coronation Island, in the South Orkney Islands. Surveyed by the Falkland Islands Dependencies Survey (FIDS) in 1948-49, and so named by them because the mineral olivine occurs in the igneous dikes intersecting the peninsula just north of the point.

Ollivant Point
Ollivant Point (-57.76667°N, -26.51667°W) is the westernmost point of Saunders Island, South Sandwich Islands. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) for Captain Martin S. Ollivant, Royal Navy, Captain of HMS Protector at the time of her survey of the island in 1964.

Olliver Peak
Olliver Peak (-84.56667°N, -173.55°W) is a rock peak (630 m) along the edge of Ross Ice Shelf. It stands at the east side of the mouth of Barrett Glacier and is the northwesternmost summit in Gabbro Hills. Named by Advisory Committee on Antarctic Names (US-ACAN) for Commander George R. Olliver, U.S. Navy, who was injured in the crash of an Otter aircraft on December 22, 1955, following a take-off from near Cape Bird.

Olsen Crags
Olsen Crags (-86.2°N, -160.8°W) is a rugged crags surmounting a small but conspicuous mountain block that projects into the east side of Amundsen Glacier just north of Epler Glacier, 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 Karinius Olsen, cook on the Fram, the ship of Amundsen's Norwegian expedition of 1910-12. This naming preserves the spirit of Amundsen's 1911 commemoration of "Mount K. Olsen," a name applied for an unidentifiable mountain in the general area.

Olsen Peak
Olsen Peak (-77.53333°N, -86.48333°W) is a peak, 2,140 m, standing 2 nautical miles (3.7 km) northwest of Mount Wyatt Earp near the north end of the Sentinel Range. Discovered by Lincoln Ellsworth on his trans-Antarctic flight of November 23, 1935. Named by the Advisory Committee on Antarctic Names (US-ACAN) for Hartveg Olsen, captain of Ellsworth's expedition ship Wyatt Earp in 1935-36.

Olsen Peak
Olsen Peak (-79.66667°N, 155.51667°W) is a peak with local relief of about 200 m between Mason Nunatak and Score Ridge in the Meteorite Hills, Darwin Mountains. Named after Edward Olsen of the Field Museum of Natural History, Pittsburgh, PA, co-investigator with W.A. Cassidy on a search for meteorites at Allan Hills, austral summer 1976-77.

Olsen Rock
Olsen Rock (-54.06667°N, -38°W) is a rock lying 0.5 nautical miles (0.9 km) southeast of Cape Paryadin, off the west end of South Georgia. Charted by DI personnel in 1926-27. Surveyed by the SGS in the period 1951-57, and named by the United Kingdom Antarctic Place-Names Committee (UK-APC) for Soren Olsen, gunner of the South Georgia Whaling Co. at Leith Harbor, 1926-30, 1933-39 and 1945-53.

Olsen Valley
Olsen Valley (-54.2°N, -36.68333°W) is a valley extending from Husvik Harbor in Stromness Bay to Carlita Bay in Cumberland West Bay, on the north side of South Georgia. The feature was known to early whalers and sealers at South Georgia. It was surveyed by the SGS in the period 1951-57, and named by the United Kingdom Antarctic Place-Names Committee (UK-APC) for Nils E. Olsen, Manager of Tonsberg Hvalfangeri, Husvik, 1950-56.

Mount Olsen
Mount Olsen (-53.01667°N, 73.33333°W) is a snow-covered peak (635 m) standing 0.2 nautical miles (0.4 km) east of Hayter Peak on Laurens Peninsula, in the northwest part of Heard Island. The feature appears to have been roughly charted on an 1860 sketch map compiled by Captain H.C. Chester, American sealer operating in the area during this period. It was surveyed in 1948 by ANARE (Australian National Antarctic Research Expeditions), who named it for Bjarne Olsen, first mate on the whale catcher Kidalkey which visited the island in January 1929.

Olson Glacier
Olson Glacier (-72.81667°N, 166.68333°W) is a tributary glacier descending westward from Malta Plateau to enter Seafarer Glacier, in the Victory 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 Richard D. Olson of the Office of Antarctic Programs, National Science Foundation, who participated in research administration activities at McMurdo Station, 1967-68.

Olson Island
Olson Island (-77.23333°N, -153.28333°W) is the largest and northernmost of the ice-covered White Islands, in southern Sulzberger Bay. The feature is rudely delineated on the map of the Byrd Antarctic Expedition, 1928-30, and is indicated as "low ice cliffs" that rise above the ice shelf in this part of the bay. Mapped in detail by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1959-65. Named for Michael L. Olson, United States Antarctic Research Program (USARP) ionospheric physicist at Byrd Station, winter party 1968, and a member of the Plateau Station summer party, 1968-69. == See also == * List of antarctic and sub-antarctic islands

Olson Neve
Olson Neve (-82.11667°N, 158°W) is a neve on the northwest side of Cobham Range which nourishes the Lucy and Prince Philip Glaciers, in the Churchill Mountains. Mapped by the Holyoake, Cobham and Queen Elizabeth Ranges party of the New Zealand Geological Survey Antarctic Expedition (NZGSAE) (1964-65). Named for Lieutenant Dennis A. Olson, U.S. Navy, who flew the New Zealand party to the neve and supported it during the summer season. The feature is incorrectly identified as "Olsen Neve" on some maps of the late 1960s.

Olson Nunatak
Olson Nunatak (-74.91667°N, 162.46667°W) is a bare rock nunatak lying at the south side of the terminus of Reeves Glacier, 4 nautical miles (7 km) north of the summit of Mount Gerlache, in Victoria Land. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1955-63. Named by Advisory Committee on Antarctic Names (US-ACAN) for James J. Olson, geophysicist with the United States Antarctic Research Program (USARP) Ross Ice Shelf party in the 1961-62 season.

Olson Peaks
Olson Peaks (-79.26667°N, 160.08333°W) is a two close-lying peaks, the higher 1,335 m, standing 4 nautical miles (7 km) west of Cape Lankester on the north side of Bertoglio Glacier. Mapped by the United States Geological Survey (USGS) from tellurometer surveys and Navy air photos, 1959-63. Named by Advisory Committee on Antarctic Names (US-ACAN) for Gary D. Olson, a member of the U.S. Army aviation support unit for Topo North and Topo South (1961-62) which conducted the tellurometer surveys.

Olstad Glacier
Olstad Glacier (-68.83333°N, -90.68333°W) is a heavily crevassed glacier descending to the west coast of Peter I Island about 2 nautical miles (3.7 km) south of Tofte Glacier. Peter I Island was circumnavigated by the Norwegain whale catcher Odd I in January 1927 and was explored from the Norvegia in February 1929. The glacier is named for Ola Olstad, Norwegian zoologist who, transported by various whaling ships, conducted research in South Georgia, South Shetland Islands and Palmer Archipelago in 1927-28.

Olstad Peak
Olstad Peak (-54.48333°N, -37.08333°W) is a peak, 650 m, surmounting Annenkov Island off the south coast of South Georgia. First observed in 1775 by a British expedition under Cook. It was surveyed by the SGS in the period 1951-57, and named by the United Kingdom Antarctic Place-Names Committee (UK-APC) for Ola Olstad, Norwegian zoologist, member of the Norwegian expedition under Horntvedt, 1927-28, and chief scientist of the Norwegian expedition under Nils Larsen, 1928-29.

Oluf Rocks
Oluf Rocks (-63.68333°N, -60.16667°W) is a small group of rocks lying 3.5 nautical miles (6 km) east of Cape Neumayer, Trinity Island, in the Palmer Archipelago. Photographed by the Falkland Islands and Dependencies Aerial Survey Expedition (FIDASE) in 1955-57 and mapped from these photos by the Falkland Islands Dependencies Survey (FIDS). Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1960 after the Danish freighter Oluf Sven (Captain J.C. Ryge) which transported the FIDASE to Deception Island in 1955 and 1956, and was used during the two summer seasons as a mobile base for operations by ground survey parties.

Olympus Range
Olympus Range (-77.48333°N, 161.5°W) is a primarily ice-free mountain range of Victoria Land with peaks over 2,000 m, between Victoria and McKelvey Valleys on the north and Wright Valley on the south. Mapped by the Victoria University of Wellington Antarctic Expedition (VUWAE), 1958-59, and named for the mythological home of the Greek gods. Peaks in the range are named for figures in Greek mythology.

Mount Olympus
Mount Olympus (-80.21667°N, 156.76667°W) is a rectangular, flat, ice-covered mountain over 2,400 m, standing 5 nautical miles (9 km) east of Mount Henderson in the Britannia Range. Named by Advisory Committee on Antarctic Names (US-ACAN), in association with nearby Byrd Glacier, after the Admiral Byrd.

Omega Glacier
Omega Glacier (-68.61667°N, 41.01667°W) is a glacier flowing to the coast just south of Cape Omega in Queen Maud Land. Mapped from surveys and air photos by Japanese Antarctic Research Expedition (JARE), 1957-62, who gave the name.

Omega Island
Omega Island (-64.33333°N, -62.93333°W) is an island 2 nautical miles (3.7 km) long, which lies immediately south of Eta Island in the Melchior Islands, Palmer Archipelago. This island, the largest feature in the southeast part of the Melchior Islands, is part of what was called "Ile Melchior" by the French Antarctic Expedition under Charcot, 1903-05, but the name Melchior now applies for the whole island group. Omega Island was roughly surveyed by DI personnel in 1927. The name Omega, derived from the last letter of the Greek alphabet, appears to have been first used on a 1946 Argentine government chart following surveys of the Melchior Islands by Argentine expeditions in 1942 and 1943. == See also == * List of antarctic and sub-antarctic islands

Omega Nunatak
Omega Nunatak (-81.91667°N, -29.2°W) is an isolated, flat-topped nunatak 21 nautical miles (39 km) south-southwest of the Whichaway Nunataks. First mapped in 1957-58 by the Commonwealth Trans-Antarctic Expedition and so named because it was the last rock outcrop seen, until Victoria Land was reached, on the transpolar route of the Commonwealth Trans-Antarctic Expedition in 1957-58.

Omega Peak
Omega Peak (-72.15°N, 166.05°W) is a peak 1 nautical mile (1.9 km) northeast of Le Couteur Peak, in the Millen Range. So named by the Southern Party of NZFMCAE, 1962-63, because this was the last major peak climbed by the party, January 2, 1963.

Cape Omega
Cape Omega (-68.56667°N, 40.98333°W) is a prominent rock cape between Omega Glacier and Daruma Rock on the coast of Queen Maud Land. Mapped from surveys and air photos by Japanese Antarctic Research Expedition (JARE), 1957-62, who gave the name.

Omicron Islands
Omicron Islands (-64.35°N, -62.91667°W) is a group of small islands and rocks which lie close southeast of Omega Island in the Melchior Islands, Palmer Archipelago. The name, derived from the 15th letter of the Greek alphabet, appears to have been first used on a 1946 Argentine government chart following surveys of these islands by Argentine expeditions in 1942 and 1943. == See also == * List of antarctic and sub-antarctic islands

Ommanney Bay
Ommanney Bay (-60.55°N, -45.53333°W) is a bay 2 nautical miles (3.7 km) wide between Prong Point and Foul Point on the north coast of Coronation Island, in the South Orkney Islands. First seen and roughly charted by Captain George Powell and Captain Nathaniel Palmer in 1821. Recharted in 1933 by DI personnel on the Discovery II and named for Francis D. Ommanney, zoologist on the staff of the Discovery Committee.

Ommanney Glacier
Ommanney Glacier (-71.53333°N, 169.48333°W) is a valley glacier, 20 nautical miles (37 km) long, meandering northward in the Admiralty Mountains to discharge into Relay Bay, on the west side of Robertson Bay, along the north coast of Victoria Land. Charted by the British Antarctic Expedition, 1898-1900, under C.E. Borchgrevink, who named it for Admiral Sir Erasmus Ommanney, who had served in the Arctic Expedition of 1850.

Ommundsen Island
Ommundsen Island (-66.33333°N, 110.36667°W) is an island just west of Midgley Island in the Windmill Islands. First mapped from air photos taken by U.S. Navy Operation Highjump, 1946-47. Named by Advisory Committee on Antarctic Names (US-ACAN) for Audon Ommundsen, transport specialist at Wilkes Station in 1958. == See also == * List of antarctic and sub-antarctic islands

Ondori Island
Ondori Island (-69°N, 39.53333°W) is a small island lying 1 nautical mile (1.9 km) north of Ongul Island and 0.8 nautical miles (1.5 km) west of Nesoya in the northeast part of Lutzow-Holm Bay. Mapped from surveys and air photos by the Japanese Antarctic Research Expedition (JARE), 1957-62. The name "Ondori-jima" (rooster island) was given by JARE Headquarters in 1972 in association with nearby Mendori Island. == See also == * List of antarctic and sub-antarctic islands

Onezhskiye Nunataks
Onezhskiye Nunataks (-71.58333°N, 7.05°W) is a small group of nunataks, the largest being Storkvarvsteinen Peak, situated 9 nautical miles (17 km) north-northeast of Slettefjellet in the Muhlig-Hofmann Mountains, Queen Maud Land. Mapped by Norsk Polarinstitutt from surveys and air photos by Norwegian Antarctic Expedition, 1956-60. Also mapped by Soviet Antarctic Expedition in 1961; the name is an adjective derived from Onega, a river in the Soviet Union.

Ong Valley
Ong Valley (-83.23333°N, 157.61667°W) is a mainly ice-free valley 5 nautical miles (9 km) long, just west of Kreiling Mesa in the Miller Range. Named by Advisory Committee on Antarctic Names (US-ACAN) for John S. Ong, United States Antarctic Research Program (USARP) traverse engineer on the South Pole Traverse (1962-63).

Ongley Island
Ongley Island (-62.43333°N, -59.9°W) is a small island lying 2.5 nautical miles (4.6 km) west of Dee Island, close off the north side of Greenwich Island, in the South Shetland Islands. Charted in 1935 by DI personnel on the Discovery II, but the name appears to have been first used on a 1948 Admiralty chart based upon this survey. == See also == * List of antarctic and sub-antarctic islands

Ongul Island
Ongul Island (-69.01667°N, 39.53333°W) is an island 1.5 nautical miles (2.8 km) long, which is the largest feature in the Flatvaer Islands lying just within the east side of the entrance of Lutzow-Holm Bay. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition, 1936-37. They believed this island to be connected to East Ongul Island and applied the name "Ongul" (fishhook), which is suggestive of the outline of the two islands taken together. In 1957, the Japanese Antarctic Research Expedition (JARE) found East Ongul Island to be a separate entity, but the name Ongul Island is retained for this largest island in the group. == See also == * List of antarctic and sub-antarctic islands

Ongul Sound
Ongul Sound (-69.03333°N, 39.63333°W) is a sound, 2 nautical miles (3.7 km) wide, between the east shore of Lutzow-Holm Bay and the Flatvaer Islands in which Ongul Island is the principal feature. Mapped by cartographers from air photos taken by the Lars Christensen Expedition, 1936-37, and named for its association with Ongul Island.

Ongulgalten Island
Ongulgalten Island (-69.06667°N, 39.6°W) is the northernmost of three aligned islands lying 1 nautical mile (1.9 km) southeast of the Te Islands, at the south end of the Flatvaer Islands. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition, 1936-37, and named Ongulgalten (the fishhook boar) in association with nearby Ongul Island. == See also == * List of antarctic and sub-antarctic islands

Ongulkalven Island
Ongulkalven Island (-69.01667°N, 39.45°W) is an island lying 1 nautical mile (1.9 km) west of Ongul Island in Lutzow-Holm Bay. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition, 1936-37, and named Ongulkalven (the fishhook calf). == See also == * List of antarctic and sub-antarctic islands

Onley Hill
Onley Hill (-67.71667°N, 63.03333°W) is a bare rock hill, 840 m, standing 1 nautical mile (1.9 km) south of Mount Henderson in the northeast part of the Framnes Mountains, Mac. Robertson Land. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition, 1936-37, and named Sorkollen (the south knoll). Renamed by Antarctic Names Committee of Australia (ANCA) for L. Onley, weather observer at Mawson Station in 1959.

Onlooker Nunatak
Onlooker Nunatak (-71.9°N, 162.36667°W) is an isolated nunatak which protrudes prominently above the ice of the Rennick Glacier just southeast of Morozumi Range. Named by the northern party of New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1963-64. The name is suggestive of the aspect of the feature.

Onnum Ridge
Onnum Ridge (-80.11667°N, 156.41667°W) is a mountain spur that descends northeast to McCraw Glacier, 3 nautical miles (6 km) south of Derrick Peak in the Britannia Range. Named in association with Britannia by a University of Waikato (N.Z.), geological party, 1978-79, led by M.J. Selby. Onnum is a historical placename formerly used in Roman Britain.

Onnum Valley
Onnum Valley (-80.1°N, 156.35°W) is an ice-free valley between Derrick Peak and Onnum Ridge in Britannia Range. Named in association with Onnum Ridge by a University of Waikato (N.Z.) geological party, 1978-79, led by M.J. Selby.

Onyx River
Onyx River (-77.53333°N, 161.75°W) is a meltwater stream which flows westward through the Wright Valley from Wright Lower Glacier to Lake Vanda. Mapped and named by the Victoria University of Wellington Antarctic Expedition (VUWAE), 1958-59.

Oom Bay
Oom Bay (-67.43333°N, 60.73333°W) is a well-defined bay, 2 nautical miles (3.7 km) wide, indenting the coast between Cape Bruce and Campbell Head. Discovered in February 1931 by the British Australian New Zealand Antarctic Research Expedition (BANZARE) under Mawson, who named it for Lieutenant K.E. Oom, RAN, cartographer with the expedition.

Oom Island
Oom Island (-67.4°N, 60.65°W) is a small island 0.5 nautical miles (0.9 km) northeast of Campbell Head, off the coast of Mac. Robertson Land. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition, 1936-37, and named Uksoy. Renamed by Antarctic Names Committee of Australia (ANCA) for Lieutenant K.E. Oom, RAN, a member of the British Australian New Zealand Antarctic Research Expedition (BANZARE), 1929-31. == See also == * List of antarctic and sub-antarctic islands

Oona Cliff
Oona Cliff (-72.45°N, 160.15°W) is a north-facing rock and ice cliff, about 4 nautical miles (7 km) long, situated just northwest of Mount Walton in the Outback Nunataks. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1959-64. Named by Advisory Committee on Antarctic Names (US-ACAN) for Hain Oona, ionospheric physicist at South Pole Station, 1968.

Mount Oona
Mount Oona (-83.15°N, 162.6°W) is a mountain, 2,170 m, at the north end of the ridge between Helm Glacier and Lowery Glacier in the Queen Elizabeth Range. Named by Advisory Committee on Antarctic Names (US-ACAN) for Henn Oona, United States Antarctic Research Program (USARP) aurora scientist at South Pole Station, 1964.

Operose Peak
Operose Peak (-80.1°N, 156.23333°W) is a peak above Onnum Valley to the southwest of Derrick Peak in the Britannia Range. The steep lower slopes of the peak are of Beacon sandstone; the top (2130 m) is made up of a thick dolerite sill. The Latin name means laborious or requiring great pain reflecting the steepness of the slopes.

Opornyy Point
Opornyy Point (-69.8°N, 13°W) is an ice point along the west side of Lazarev Ice Shelf, about 15 nautical miles (28 km) north of Leningradskiy Island, in Queen Maud Land. Mapped by the Soviet Antarctic Expedition in 1959 and named Mys Opornyy (support point) because the ice shelf at this point rests on the ocean floor.

Oppegaard Spur
Oppegaard Spur (-84.48333°N, -177.36667°W) is a narrow rock spur, 2 nautical miles (3.7 km) long, extending northwest from the southwest portion of Mount Speed, standing just east of Kosco Glacier where the latter enters Ross Ice Shelf. Discovered and photographed by the United States Antarctic Service (USAS), 1939-41. Named by Advisory Committee on Antarctic Names (US-ACAN) for Richard D. Oppegaard, Seaman Apprentice, U.S. Navy, a member of the U.S. Naval Support Force, Antarctica, who lost his life in a shipboard accident, November 8, 1957.

Oppkuven Peak
Oppkuven Peak (-72.61667°N, 0.4°W) is a peak 2 nautical miles (3.7 km) north of Gavlen Ridge in the Roots Heights, Sverdrup Mountains, 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 Oppkuven (the ascent peak).

Orca Peak
Orca Peak (-54.26667°N, -36.53333°W) is a peak, 395 m, standing west of Grytviken on the north coast of South Georgia. The name appears to be first used on a 1930 British Admiralty chart.

Orca Seamount
Orca Seamount (-62.43333°N, -58.4°W) is a seamount in the Bransfield Strait; named after the cetacean Orcinus orca ("Killer Whale"), often sighted in these waters. Name approved 2/2000 (ACUF 281). The variant name of Viehoff Seamount (approved in 6/95 ACUF 263) was named for Dr. Thomas Viehoff, a remote sensing specialist in marine sciences. Name proposed by Dr. G.B. Udintsev, Vernadsky Institute of Geochemistry (VIG).

Oread Spur
Oread Spur (-72.58333°N, 168.88333°W) is a rock spur on the south side of Tucker Glacier, 10 nautical miles (18 km) west of Crater Cirque, on which a survey station was placed at a height of 1,185 m by the New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1957-58. They named it Oread (mountain nymph), which is derived from Greek mythology.

Orel Ice Fringe
Orel Ice Fringe (-64.76667°N, -62.6°W) is a strip of coastal ice bordering the south side of Errera Channel between Beneden Head and Porro Bluff, on the west coast of Graham Land. Mapped by the Falkland Islands Dependencies Survey (FIDS) from photos taken by Hunting Aerosurveys Ltd. in 1956-57. Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1960 for Eduard von Orel (1877-1941), Austrian surveyor who in 1905 designed the first stereoautograph for plotting maps directly from horizontal photographs.

Orestes Glacier
Orestes Glacier (-77.45°N, 161.88333°W) is a narrow glacier within Orestes Valley, aligned along the valley's north wall, in the Olympus Range, Victoria Land. Named after the valley by Advisory Committee on Antarctic Names (US-ACAN) in 1997.

Orestes Valley
Orestes Valley (-77.46667°N, 161.91667°W) is a small ice-free valley at the north side of Mount Orestes in the Olympus Range, Victoria Land. Named in 1964 for its association with Mount Orestes by American geologist Parker E. Calkin.

Mount Orestes
Mount Orestes (-77.46667°N, 161.91667°W) is a prominent peak, over 1,600 m, just east of Bull Pass in the Olympus Range of Victoria Land. Named by the Victoria University of Wellington Antarctic Expedition (VUWAE) (1958-59) for a figure in Greek mythology.

Orford Cliff
Orford Cliff (-66.91667°N, -66.48333°W) is a coastal cliff of Graham Land, overlooking the east side of Lallemand Fjord just east of Andresen Island. Surveyed by Falkland Islands Dependencies Survey (FIDS) in 1956. Named for Michael J.H. Orford, FIDS assistant surveyor at Detaille Island in 1956, a member of the party which found a route from Detaille Island to Avery Plateau, via Orford Cliff and Murphy Glacier.

Organ Peak
Organ Peak (-66.93333°N, -67°W) is the northernmost peak of Arrowsmith Peninsula, Graham Land. Mapped in 1960 from surveys by Falkland Islands Dependencies Survey (FIDS). The name, which arose locally in 1956, is descriptive; the fluted appearance of this peak resembles the pipes of an organ.

Organ Pipe Cliffs
Organ Pipe Cliffs (-68.41667°N, 149.06667°W) is a line of coastal cliffs in the form of palisades of columnar dolerite overlooking the sea to the west of Cape Wild. Discovered by the Australasian Antarctic Expedition (1911-14) under Douglas Mawson, who named them because of the similarity of the rock structure to organ pipes.

Organ Pipe Peaks
Organ Pipe Peaks (-86.05°N, -150°W) is a row of aiguille type rock peaks, 7 nautical miles (13 km) long, standing just north of Mount Harkness and east of Scott Glacier in the Gothic Mountains. Discovered by the geological party of the Byrd Antarctic Expedition, 1933-35, who gave the descriptive name.

The Organ Pipes
The Organ Pipes (-82.61667°N, -52.7°W) is a notable rock cliffs on the northwest side of Jaeger Table, south of Cairn Ridge, in the Dufek Massif, Pensacola Mountains. The name is suggested by the appearance of the feature caused by weathering along prominent vertical joints in the gabbro rock. Named by Arthur B. Ford, United States Geological Survey (USGS) geologist, leader of the USGS Pensacola Mountains survey party, 1978-79.

Organpipe Nunatak
Organpipe Nunatak (-63.98333°N, -58.11667°W) is a nunatak rising to 150 m in the glacier flowing west into Holluschickie Bay, in northwest James Ross Island. Named descriptively following British Antarctic Survey (BAS) geological work on the island, 1985-86, from the excellent columnar jointing exhibited on the feature.

Organpipe Point
Organpipe Point (-62.46667°N, -60.15°W) is a prominent east-west aligned jagged headland rising to about 60 or 70 m above sea level. Formed of doleritic rock showing very conspicuous sub-vertical, continuous columnar joints resembling organ pipes.

Orheim Point
Orheim Point (-79.38333°N, -84.31667°W) is a rock point at the end of Inferno Ridge 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 Olav Orheim, Norwegian glaciologist on the United States Antarctic Research Program (USARP) South Pole-Queen Maud Land Traverse II, 1965-66.

Orion Massif
Orion Massif (-70.38333°N, -66.78333°W) is a prominent massif, 14 nautical miles (26 km) long, with a complicated network of peaks, passes, ridges and cirques. Located 4 nautical miles (7 km) east-northeast of Scorpio Peaks, between the upper parts of Meiklejohn and Millett Glaciers, in Palmer Land. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) after the constellation of Orion.

Orleans Strait
Orleans Strait (-63.83333°N, -60.33333°W) is a strait running NE-SW and separating Trinity Island and Tower Island from Davis Coast, Antarctic Peninsula. Possibly first seen by Nathaniel B. Palmer, captain of the Hero, on November 18, 1820. Named and outlined in part by the French Antarctic Expedition, 1837-40, under Captain Jules Dumont d'Urville. Charted in greater detail by the Swedish Antarctic Expedition, 1901-04, under Nordenskjold. Presumably named for the royal house of Orleans; Louis Philippe (formerly Duc d'Orleans) was King of France at the time of d'Urville's voyage.

Mount Ormay
Mount Ormay (-70.73333°N, 66.7°W) is a ridgelike mountain 1 nautical mile (1.9 km) south of Mount Butterworth in the Aramis Range, Prince Charles Mountains. Plotted from ANARE (Australian National Antarctic Research Expeditions) air photos taken in 1956 and 1960. Named by Antarctic Names Committee of Australia (ANCA) for P.I. Ormay, plumber at Wilkes Station in 1963.

Ormehausen Peak
Ormehausen Peak (-72.01667°N, 14.63333°W) is a peak at the north end of Linnormen Hills in the Payer Mountains of Queen Maud Land. Photographed from the air by the German Antarctic Expedition (1938-39). Mapped by Norwegian cartographers from surveys and air photos by the Norwegian Antarctic Expedition (1956-60) and named Ormehausen (the serpent's head).

Ormeryggen
Ormeryggen (-72.06667°N, 14.55°W) is the three major hills forming the central portion of Linnormen Hills, standing southeast of Skavlho Mountain in the Payer Mountains of Queen Maud Land. Photographed from the air by the German Antarctic Expedition (1938-39). Mapped by Norwegian cartographers from surveys and air photos by the Norwegian Antarctic Expedition (1956-60) and named Ormeryggen (the serpent's back).

Ormesporden Hill
Ormesporden Hill (-72.08333°N, 14.31667°W) is a hill at the southwest end of Linnormen Hills in the Payer Mountains of Queen Maud Land. Mapped by Norwegian cartographers from surveys and air photos by the Norwegian Antarctic Expedition (1956-60) and named Ormesporden (the serpent's tail).

Mount Orndorff
Mount Orndorff (-84.61667°N, -175.43333°W) is a peak (1,520 m) standing 5 nautical miles (9 km) south of Nilsen Peak, at the west side of Massam Glacier, in the Queen Maud Mountains. Named by Advisory Committee on Antarctic Names (US-ACAN) for Lieutenant Commander Howard J. Orndorff, U.S. Navy, a member of the winter party at McMurdo Station in 1963.

Orne Harbor
Orne Harbor (-64.61667°N, -62.53333°W) is a cove 1 nautical mile (1.9 km) wide, indenting the west coast of Graham Land 2 nautical miles (3.7 km) southwest of Cape Anna. Discovered by the Belgian Antarctic Expedition under Gerlache in 1898. The name Orne Harbor was probably in use by Norwegian whalers, because it was used by Scottish geologist David Ferguson following his geologic reconnaissance of this area aboard the whaler Hanka in 1913.

Orne Islands
Orne Islands (-64.66667°N, -62.66667°W) is a group of small islands lying close north of Ronge Island, off the west coast of Graham Land. First roughly surveyed in 1898 by the Belgian Antarctic Expedition under Gerlache. The name Orne Islands was probably in use by Norwegian whalers, because it was used by Scottish geologist David Ferguson following his geological reconnaissance of this area aboard the Hanka in 1913. == See also == * List of antarctic and sub-antarctic islands

Ornen Rocks
Ornen Rocks (-62.01667°N, -57.58333°W) is a group of rocks, some of which are above water, 1 nautical mile (1.9 km) northeast of Cape Melville, King George Island, in the South Shetland Islands. Named after the Norwegian whaler Ornen which went aground there about 1908 or 1909.

Orpheus Pass
Orpheus Pass (-62.63333°N, -60.21667°W) is the 250 m wide pass in Eastern Livingston Island bounded by Pliska Ridge to the southeast and Burdick Ridge to the NW. Elevation just over 560 m. Part of the overland route from Balkan Plateau via the nameless saddle between Willan Nunatak and Burdick South Peak, then via Orpheus Pass to upper Perunika Glacier and Mount Friesland area. Midpoint located 6,100 m east of Sinemorets Hill. The name Orpheus was originally applied in 1995 to a neighboring peak, but due to priority of the existing British name form Willan Nunatak, transferred subsequently to the present feature.

Orr Glacier
Orr Glacier (-71.6°N, 162.86667°W) is a tributary glacier which drains the large cirque between Mounts Moody and Bernstein in the Lanterman Range, Bowers Mountains, and flows west into Rennick Glacier. Mapped by United States Geological Survey (USGS) from ground surveys and U.S. Navy air photos, 1960-62. Named by Advisory Committee on Antarctic Names (US-ACAN) for Maj. Thomas L. Orr, USA, Asst. Logistics Officer on the staff of the Commander, U.S. Naval Support Force, Antarctica, 1968 and 1969.

Orr Island
Orr Island (-77.63333°N, -149.6°W) is an ice-covered island 5 nautical miles (9 km) long, lying 3 nautical miles (6 km) southwest of Grinder Island in Marshall Archipelago, off the coast 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 Lieutenant Commander Thomas E. Orr, Supply Officer and Officer-in-Charge of the Para Rescue Team of U.S. Navy Squadron VX-6 during Operation Deep Freeze 1968. == See also == * List of antarctic and sub-antarctic islands

Orr Peak
Orr Peak (-83.48333°N, 157.81667°W) is a peak in the Miller Range overlooking Marsh Glacier, forming the eastern salient in the bluffs southward of Argo Glacier. Observed in December 1957 by the New Zealand Southern Party of the Commonwealth Trans-Antarctic Expedition (1956-58). Named for H. Orr, IGY scientist at Scott Base in 1957.

Ortiz Island
Ortiz Island (-63.3°N, -57.86667°W) is an island in the Duroch Islands. It lies 0.2 nautical miles (0.4 km) south of the eastern end of Largo Island and a like distance from the northern coast of Trinity Peninsula. The name was given by Martin Halpern, leader of the University of Wisconsin (USARP) field party which geologically mapped the Duroch Islands, 1961-62. It honors Marcos Ortiz G., Captain of the Chilean ship its study of this area. == See also == * List of antarctic and sub-antarctic islands

Orton Cave
Orton Cave (-66.38333°N, 110.45°W) is a cave in the western wall of Cave Ravine, Ardery Island, in the Windmill Islands. Discovered in 1961 by Dr. M.N. Orton, medical officer at Wilkes Station, for whom it was named by Antarctic Names Committee of Australia (ANCA).

Orton Reef
Orton Reef (-66.26667°N, 110.55°W) is a reef with a least depth of 2 ft in the north part of Newcomb Bay, located 0.5 nautical miles (0.9 km) north of Molholm Island in the Windmill Islands. Discovered and charted in February 1957 by a party from the USS Wilkes Station, who assisted in an ANARE (Australian National Antarctic Research Expeditions) survey of Newcomb Bay in the 1961-62 season.

Orville Coast
Orville Coast (-75.75°N, -65.5°W) is that portion of the coast of Antarctica lying west of Ronne Ice Shelf between Cape Adams and Cape Zumberge. Discovered by the Ronne Antarctic Research Expedition (RARE), 1947-48, under Ronne, who named this coast for Captain Howard T. Orville, U.S. Navy, Head of the Naval Aerological Service, who was largely responsible for formulating the RARE meteorological program. The name Orville Coast is considered a more useful reference than "Orville Escarpment," the name originally applied for this area.

Orwell Bight
Orwell Bight (-60.71667°N, -45.38333°W) is a body of water lying south of the eastern half of Coronation Island, bounded on the west by Signy Island and on the east by the Robertson Islands, in the South Orkney Islands. The general nature of this bight was first delineated by Petter Sorlle, Norwegian whaling captain who mapped this area in 1912-13. It was surveyed by DI personnel in 1933 and by the Falkland Islands Dependencies Survey (FIDS) in 1948-49. Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) for the Norwegian transport Orwell, the second ship of that name belonging to the Tonsberg Hvalfangeri, which anchored in Borge Bay, Signy Island, on the west side of this bight in the seasons 1925-26 to 1929-30.

Orwell Glacier
Orwell Glacier (-60.71667°N, -45.63333°W) is a small glacier, less than 0.5 nautical miles (0.9 km) long, which descends steeply from the south slopes of Snow Hills and terminates in 20 m ice cliffs along the south margin of Elephant Flats in the east part of Signy Island, in the South Orkney Islands. Surveyed by DI personnel in 1927 and named by them for the Norwegian transport throughout the seasons 1925-26 to 1929-30. Resurveyed by the Falkland Islands Dependencies Survey (FIDS) in 1947.

Orwell Lake
Orwell Lake (-60.71667°N, -45.61667°W) is a small lake in Moraine Valley, lying southeast of Orwell Glacier in the east part of Signy Island, South Orkney Islands. The lake has developed with the retreat of Orwell Glacier in recent years. Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1981 in association with the glacier.

Mount Osborne
Mount Osborne (-78.61667°N, -84.78333°W) is a mountain (2,600 m) on the southwest side of Thomas Glacier, 5 nautical miles (9 km) east of Mount Craddock, in the Sentinel Range, Ellsworth Mountains. First mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1957-59. Named by Advisory Committee on Antarctic Names (US-ACAN) for Thomas M. Osborne, Navy builder, who helped construct and served at the South Pole Station with the winter party, 1957.

Oscar Cove
Oscar Cove (-64.91667°N, -62.91667°W) is a cove next west of Garzon Point in southern Paradise Harbor, Danco Coast, Graham Land. The cove was named "Caleta Oscar" by the Argentine Antarctic Expedition, 1949-50, from the forename of the second-in- command of the expedition ship Chiriguano used in survey of the area.

Oscar II Coast
Oscar II Coast (-65.75°N, -62.5°W) is that portion of the east coast of the Antarctic Peninsula between Cape Fairweather and Cape Alexander. Discovered in 1893 by Captain C.A. Larsen, who named it for King Oscar II of Norway and Sweden.

Oscar Point
Oscar Point (-74.58333°N, 164.88333°W) is a small rock point along the north shore of Terra Nova Bay, 1 nautical mile (1.9 km) northwest of Markham Island, in Victoria Land. Discovered by the British Antarctic Expedition, 1898-1900, and named for King Oscar of Norway and Sweden. C.E. Borchgrevink, the leader of this expedition, was a native of Norway. Originally charted by Borchgrevink as an island, the feature is now known to be joined to the coast.

Osechka Peak
Osechka Peak (-71.51667°N, 15.43333°W) is a small peak, 1,740 m, standing 6 nautical miles (11 km) south of Vorposten Peak in Lomonosov Mountains, Queen Maud Land. Mapped from air photos and surveys by Norwegian Antarctic Expedition, 1958-59; remapped by Soviet Antarctic Expedition, 1960-61, and named Gora Osechka (misfire mountain).

Osen Cove
Osen Cove (-69.45°N, 39.66667°W) is a lake-like cove that indents the north part of Skarvsnes Foreland and opens on Byvagen Bay at the east side of Lutzow-Holm Bay. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition, 1936-37, and named Osen (the outlet).

Oshiage Beach
Oshiage Beach (-69.63333°N, 39.45°W) is a beach on the northeast side of Skallen Hills on the coast of Queen Maud Land. The beach faces an inlet which lies between Skallen Hills and the terminus of Skallen Glacier. Mapped from surveys and air photos by the Japanese Antarctic Research Expedition (JARE), 1957-62. The name "Oshiage-hama" (raised beach) was applied by JARE Headquarters in 1972.

Osicki Glacier
Osicki Glacier (-84.68333°N, 170.75°W) is a narrow, deeply entrenched glacier just south of Mount Deakin in the Commonwealth Range, flowing west into Beardmore Glacier. Named by Advisory Committee on Antarctic Names (US-ACAN) for Kenneth J. Osicki, United States Antarctic Research Program (USARP) biologist at McMurdo Station, 1963.

Oskeladden Rock
Oskeladden Rock (-71.3°N, 11.45°W) is a rock lying 0.9 nautical miles (1.7 km) south of Pal Rock in the Arkticheskiy Institut Rocks, at the northwest extremity of the Wohlthat Mountains of Queen Maud Land. Discovered and photographed by the German Antarctic Expedition, 1938-39. Mapped by Norway from air photos and surveys by Norwegian Antarctic Expedition, 1956-60, and named Oskeladden.

Osmic Hill
Osmic Hill (-54.31667°N, -36.5°W) is a conspicuous rounded hill which rises abruptly from the surrounding plain to 305 m, marking the north limit of an undulating ridge of hills on the west side of Moraine Fjord, South Georgia. Roughly surveyed by the Swedish Antarctic Expedition, 1901-04, under Nordenskjold. Named by the Falkland Islands Dependencies Survey (FIDS) following their sketch survey in 1951. The name is one in a group in the vicinity of Discovery Point derived from the chemical fixatives used there in biological work by the FIDS.

Osoya
Osoya (-69.45°N, 39.61667°W) is an island in the middle of Osen Cove, which indents the north coast of Skarvsnes Foreland, on the east side of Lutzow-Holm Bay. Mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition, 1936-37, and named Osoya (the outlet island) in association with Osen Cove.

Mount Ostenso
Mount Ostenso (-78.3°N, -86.18333°W) is a mountain (4,180 m) 2 nautical miles (3.7 km) south of Mount Giovinetto in the main ridge of the Sentinel Range, Ellsworth Mountains. First mapped by the Marie Byrd Land Traverse Party (1957-58) led by C.R. Bentley, and named for Ned A. Ostenso, traverse seismologist at Byrd Station (1957) and a member of the party.