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23-555: The Mackay Mountains ( 77°30′S 143°20′W  /  77.500°S 143.333°W  / -77.500; -143.333  ( Mackay Mountains ) ) are a prominent group of peaks 10 nautical miles (19 km; 12 mi) south of the Allegheny Mountains in the Ford Ranges of Marie Byrd Land , Antarctica. Download coordinates as: The Mackay Mountains are south of the upper Boyd Glacier and east of

46-674: A benefactor of the expedition. Features and nearby features include: 77°32′S 143°34′W  /  77.533°S 143.567°W  / -77.533; -143.567 . A nunatak which marks the southwest extremity of the Mackay Mountains. Mapped by the United States Antarctic Service (USAS; 1939–41) and by the United States Geological Survey (USGS) from surveys and United States Navy air photos (1959-65). Named by

69-616: Is a quartzose metaflysch sequence at least 1 kilometre (0.62 mi) thick that was probably deposited on a submarine fan. In Mackay Mountains the isochron age for the metamorphism of the Swanson Formation is 444 ± 4Ma. The Mackay Mountains were discovered by the Byrd Antarctic Expedition (ByrdAE) in 1934. They were named for Clarence Mackay of the Postal Telegraph and Mackay Radio Companies,

92-907: Is the alma mater of Paul Siple , leader of the United States Antarctic Service West Base. 77°15′S 143°20′W  /  77.250°S 143.333°W  / -77.250; -143.333 . The highest peak of the Allegheny Mountains, standing 1 nautical mile (1.9 km; 1.2 mi) west of Mount Swartley. Discovered on aerial flights from the West Base of USAS in 1940. Named for Professor Chester A. Darling of Allegheny College. 77°17′S 143°20′W  /  77.283°S 143.333°W  / -77.283; -143.333 . A peak 1 nautical mile (1.9 km; 1.2 mi) south of Mount Darling. Discovered on aerial flights from West Base of

115-574: The Ford Ranges , Marie Byrd Land , Antarctica . They are about 10 nautical miles (19 km; 12 mi) east of the Allegheny Mountains . Download coordinates as: The Clark Mountains are north of the head of the Boyd Glacier , northeast of the Mackay Mountains and east of the Allegheny Mountains. Features include, from west to east, Mount Atwood, Mount Jones, Mount Burnham, Mount Van Valkenburg, Mount Maglione, Mount Ekblaw and

138-670: The Hammond Glacier . They are southeast of the Sarnoff Mountains , south of the Allegheny Mountains and southwest of the Clark Mountains . The isolated Lewisohn Nunatak is to the southeast. Features, from west to east, include Vivian Nunatak, Mount Monson and Mount Palombo. The Mackay Mountains and Lewisohn Nunatak contain the Lewisohn Member, a volcano-dominated unit of the Swanson Formation, which

161-603: The United States Geological Survey (USGS) from surveys and United States Navy air photos (1959-65). Named by the United States Advisory Committee on Antarctic Names (US-ACAN) for Lieutenant Commander Luther L. Zeigler, United States Navy, pilot on LC-130F Hercules aircraft flights during Operation Deep Freeze 1968. 77°13′S 142°51′W  /  77.217°S 142.850°W  / -77.217; -142.850 . A nunatak 3 nautical miles (5.6 km; 3.5 mi) east of Mount Zeigler in

184-463: The Allegheny Mountains. Mapped by USGS from surveys and United States Navy air photos, 1959-65. Named by US-ACAN for George H. Breeding, storekeeper, United States Navy, of Byrd Station, 1967. Clark Mountains The Clark Mountains ( 77°16′S 142°0′W  /  77.267°S 142.000°W  / -77.267; -142.000  ( Clark Mountains ) ) are a group of low mountains rising above 1,200 metres (3,900 ft) located in

207-563: The Clark Mountains. Discovered on aerial flights from West Base of the USAS in 1940. Named for Clarence F. Jones, Professor of Geography at Clark University. 77°16′S 142°05′W  /  77.267°S 142.083°W  / -77.267; -142.083 . A mountain, 1,170 metres (3,840 ft) high, standing 2 nautical miles (3.7 km; 2.3 mi) north of Mount Van Valkenburg. Discovered on aerial flights from West Base of

230-545: The Kelly Nunataks. The Clark Mountains were discovered and photographed on aerial flights in 1940 by the United States Antarctic Service (USAS) and named for Clark University in Worcester, Massachusetts . 77°16′S 142°17′W  /  77.267°S 142.283°W  / -77.267; -142.283 . A mountain, 1,180 metres (3,870 ft) high, at the west edge of the Clark Mountains. Discovered by

253-585: The Mackay Mountains. Discovered and mapped by the USAS (1939-41). Named by US-ACAN for Walter P. Lewisohn, radio operator with the ByrdAE (1933-35). Allegheny Mountains (Antarctica) Download coordinates as: The Allegheny Mountains are north of the upper Boyd Glacier and the Mackay Mountains , east of the Sarnoff Mountains and west of the Clark Mountains . Features, from west to east, include Mount Darling, Mount Spencer, Mount Tolley, Mount Swartley, Mount Zeigler and Cady Nunatak. Isolated features to

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276-870: The School of Geography at Clark University. 77°18′S 141°47′W  /  77.300°S 141.783°W  / -77.300; -141.783 . A low mountain 1 nautical mile (1.9 km; 1.2 mi) northeast of Mount Ekblaw. Mapped by the United States Geological Survey (USGS) from surveys and United States Navy air photos, 1959-65. Named by the United States Advisory Committee on Antarctic Names (US-ACAN) for Lieutenant (j.g.) Charles R. Maglione, United States Navy Reserve, navigator on LC-130F Hercules aircraft during Operation Deep Freeze 1968. 77°19′S 141°48′W  /  77.317°S 141.800°W  / -77.317; -141.800 . A mountain, 1,235 metres (4,052 ft) high, standing 3 nautical miles (5.6 km; 3.5 mi) east of Mount Van Valkenburg in

299-496: The USAS (1939-41). Named for Herbert R. Spencer of Erie, Pennsylvania , the Sea Scout commander of Paul Siple, leader of the West Base party of that expedition. 77°17′S 143°07′W  /  77.283°S 143.117°W  / -77.283; -143.117 . A peak, 1,030 metres (3,380 ft) high, standing 2 nautical miles (3.7 km; 2.3 mi) south of Mount Swartley. Discovered on aerial flights from West Base of

322-655: The USAS (1939-41). Named for president William P. Tolley of Allegheny College. 77°15′S 143°12′W  /  77.250°S 143.200°W  / -77.250; -143.200 . A peak 1 nautical mile (1.9 km; 1.2 mi) east of Mount Darling. Discovered on aerial flights from West Base of the USAS (1939–41). Named for Professor Stanley Swartley of Allegheny College. 77°13′S 143°03′W  /  77.217°S 143.050°W  / -77.217; -143.050 . A mountain 1,120 metres (3,670 ft) high 3 nautical miles (5.6 km; 3.5 mi) north-northeast of Mount Swartley. Mapped by USAS (1939–41) and by

345-460: The USAS in 1940 and named for Guy Burnham, Cartographer in the School of Geography of Clark University. 77°19′S 142°06′W  /  77.317°S 142.100°W  / -77.317; -142.100 . A mountain, 1,165 metres (3,822 ft) high, standing 1 nautical mile (1.9 km; 1.2 mi) south of Mount Burnham. Discovered on aerial flights from West Base of the USAS (1939–41). Named for Professor. Samuel Van Valkenburg, Director of

368-402: The USAS in 1940 on aerial flights from the West Base. Named by the USAS for the late president emeritus W.W. Atwood, Sr., of Clark University, noted geologist and geographer, and his son, W.W. Atwood, Jr., who collaborated with his father in glaciological studies. 77°14′S 142°11′W  /  77.233°S 142.183°W  / -77.233; -142.183 . The northernmost summit of

391-474: The United States Advisory Committee on Antarctic Names (US-ACAN) for Lieutenant John F. Vivian, United States Navy Reserve, co-pilot of LC-130F Hercules aircraft during Operation Deep Freeze 1968. 77°31′S 143°31′W  /  77.517°S 143.517°W  / -77.517; -143.517 . The highest summit, 1,155 metres (3,789 ft) high, in the Mackay Mountains, situated 1.5 nautical miles (2.8 km; 1.7 mi) northeast of Vivian Nunatak in

414-530: The east part of the Clark Mountains. Discovered on aerial flights from the West Base of the USAS in 1940. Named for W.E. Ekblaw, professor of geography at Clark University and a member of the Crocker Land Expedition in the Arctic (1913-17). 77°17′S 141°44′W  /  77.283°S 141.733°W  / -77.283; -141.733 . The nunataks that mark the east extremity of

437-1059: The head of Arthur Glacier, 8 nautical miles (15 km; 9.2 mi) east-southeast of Mount Warner . Mapped by USAS (1939-41) and by USGS from surveys and United States Navy air photos (1959-65). Named by US-ACAN for Terry R. Mathis, traverse engineer with the Byrd Station glaciological strain network, summer season (1967-68), and station engineer with the Byrd Station winter party (1968). 77°00′S 143°16′W  /  77.000°S 143.267°W  / -77.000; -143.267 . A somewhat isolated group of rocks lying 11 nautical miles (20 km; 13 mi) northeast of Mount Warner. Mapped by USAS (1939-41) and by USGS from surveys and United States Navy air photos (1959-65). Named by US-ACAN for Howard R. Spauiding, United States Navy, builder at Byrd Station in 1966. 77°04′S 142°28′W  /  77.067°S 142.467°W  / -77.067; -142.467 . An isolated nunatak 10 nautical miles (19 km; 12 mi) northeast of

460-492: The north and east include the Mathis Nunataks, Spaulding Rocks and Breeding Nunatak. The Allegheny Mountains were discovered on aerial exploration flights in 1934 by the Byrd Antarctic Expedition (ByrdAE) and subsequently mapped from aerial flights and ground surveys by the United States Antarctic Service (USAS) from 1939 to 1941. They were named by the USAS for Allegheny College , Meadville, Pennsylvania which

483-403: The northeast part of the Allegheny Mountains. Mapped by USGS from surveys and United States Navy air photos, 1959-65. Named by US-ACAN for Frederick M. Cady, United States Antarctic Research Program (USARP) ionospheric physicist at Byrd Station, 1968. 77°08′S 143°27′W  /  77.133°S 143.450°W  / -77.133; -143.450 . An isolated cluster of nunataks near

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506-455: The northeast end of the Mackay Mountains. Mapped by USAS (1939–41) and by USGS from surveys and United States Navy air photos (1959-65). Named by US-ACAN for Lieutenant Robert A. Palombo, United States Navy, aircraft commander during Operation Deep Freeze 1968. 77°38′S 142°50′W  /  77.633°S 142.833°W  / -77.633; -142.833 . An isolated nunatak, 10 nautical miles (19 km; 12 mi) high, southeast of

529-446: The southwest part of the group. Mapped by USAS (1939–41) and by USGS from surveys and United States Navy air photos (1959-65) Named by US-ACAN for Lieutenant Laurence C. Monson III, United States Navy Reserve, co-pilot of LC-130F Hercules aircraft during Operation Deep Freeze 1968. 77°29′S 143°12′W  /  77.483°S 143.200°W  / -77.483; -143.200 . A mountain 1,030 metres (3,380 ft) high marking

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