Alexander Island, which is also known as Alexander I Island, Alexander I Land, Alexander Land, Alexander I Archipelago, and Zemlja Alexandra I, is the largest island of Antarctica. It lies in the Bellingshausen Sea west of Palmer Land, Antarctic Peninsula from which it is separated by Marguerite Bay and George VI Sound. The George VI Ice Shelf entirely fills George VI Sound and connects Alexander Island to Palmer Land. The island partly surrounds Wilkins Sound, which lies to its west. Alexander Island is about 390 kilometres (240 mi) long in a north–south direction, 80 kilometres (50 mi) wide in the north, and 240 kilometres (150 mi) wide in the south. Alexander Island is the second-largest uninhabited island in the world, after Devon Island.
Thurston Island is a largely ice-covered, glacially dissected island, 135 nautical miles long and 55 nautical miles wide, lying between between Amundsen Sea and Bellingshausen Sea a short way off the northwest end of Ellsworth Land, Antarctica. The island is separated from the mainland by Peacock Sound, which is occupied by the west portion of Abbot Ice Shelf.
The Abbot Ice Shelf is an ice shelf 250 nautical miles long and 40 nautical miles wide, bordering Eights Coast from Cape Waite to Pfrogner Point in Antarctica. Thurston Island lies along the northern edge of the western half of this ice shelf; other sizable islands lie partly or wholly within this shelf.
Smith Glacier (75°05′S112°00′W is a low-gradient Antarctic glacier, over 160 km long, draining from Toney Mountain in an ENE direction to Amundsen Sea. A northern distributary, Kohler Glacier, drains to Dotson Ice Shelf but the main flow passes to the sea between Bear Peninsula and Mount Murphy, terminating at Crosson Ice Shelf.
The Walker Mountains are a range of peaks and nunataks which are fairly well separated but trend east–west to form the axis, or spine, of Thurston Island in Antarctica.
King Peninsula is an ice-covered peninsula, 100 nautical miles long and 20 nautical miles wide, lying south of Thurston Island and forming the south side of Peacock Sound, Antarctica. It projects from the continental ice sheet and trends west between the Abbot Ice Shelf and Cosgrove Ice Shelf to terminate at the Amundsen Sea.
Zinberg Glacier is a glacier in east Thurston Island; it flows east-northeast into Morgan Inlet between Tierney Peninsula and the promontory ending in Ryan Point. Named by Advisory Committee on Antarctic Names (US-ACAN) after Cpl. E. Zinberg, U.S. Army photographer in the Eastern Group of U.S. Navy Operation Highjump, which obtained aerial photographs of Thurston Island and adjacent coastal areas, 1946–47.
Isbrecht Glacier is a small glacier flowing south from Thurston Island in Antarctica between Cox Glacier and Hale Glacier. It was named by the Advisory Committee on Antarctic Names after JoAnn Isbrecht of the United States Geological Survey (USGS), Flagstaff, Arizona, a satellite image processing specialist who was part of the USGS team that compiled the 1:5,000,000-scale Advanced Very High Resolution Radiometer maps of Antarctica and the 1:250,000-scale Landsat image maps of the Siple Coast area in the 1990s.
Clark Peninsula is a rocky peninsula, about 3 km (2 mi) long and wide, lying 5 km (3 mi) north-east of Australia's Casey Station at the north side of Newcomb Bay on the Budd Coast of Wilkes Land in Antarctica.
Bryan Coast is that portion of the coast of Antarctica along the south shore of the Bellingshausen Sea between Pfrogner Point and the northern tip of the Rydberg Peninsula. To the west is Eights Coast, and to the east is English Coast.
Condor Peninsula is a mountainous, ice-covered peninsula, 30 nautical miles long and 10 to 15 nautical miles wide, between Odom Inlet and Hilton Inlet on the east coast of Palmer Land, Antarctica.
Noville Peninsula is a high ice-covered peninsula about 30 nautical miles long, between Peale Inlet and Murphy Inlet on the north side of Thurston Island, Antarctica.
Tribby Peak is a peak 1.5 nautical miles west of Mount Bubier on Edwards Peninsula, Thurston Island. It was named by the Advisory Committee on Antarctic Names (US-ACAN) after Osborne M. Tribby, the Pharmacist's Mate in the Eastern Group of U.S. Navy Operation Highjump and an aircrewman on the PBM Mariner flight to Noville Peninsula on January 11–12, 1947, in which survivors of the December 30 PBM crash were rescued and returned to the seaplane tender Pine Island.
The Edwards Islands are a group of about 20 small islands, mostly ice free in summer, lying off the south-western tip of the Canisteo Peninsula, which projects into the eastern Amundsen Sea between Cranton and Ferrero Bays, on the Walgreen Coast of Marie Byrd Land, Antarctica. They were plotted from air photos taken by U.S. Navy Squadron VX-6 in January 1960, and were named by the Advisory Committee on Antarctic Names for Z T Edwards, chief quartermaster on the USS Glacier during the U.S. Navy Bellingshausen Sea Expedition to this area in February 1960.
Lofgren Peninsula is an ice-covered peninsula about 22 nautical miles long, projecting between Cadwalader Inlet and Morgan Inlet on the northeast side of Thurston Island, Antarctica.
The McDonald Heights are broad, mainly snow-covered heights about 35 nautical miles (65 km) long and rising over 1,000 metres (3,300 ft) between Cape Burks and Morris Head on the coast of Marie Byrd Land, Antarctica. The heights are bounded southward by Hull Glacier, Kirkpatrick Glacier and Johnson Glacier.
Mount Howell is a mountain 3 nautical miles (6 km) south-southwest of Mount Borgeson in the Walker Mountains of Thurston Island, Antarctica. It was named by the Advisory Committee on Antarctic Names after Lieutenant Commander John D. Howell, a pilot and airplane commander in the Eastern Group of U.S. Navy Operation Highjump, which obtained aerial photographs of this mountain and coastal areas adjacent to Thurston Island in 1946–47. Commander Howell landed a PBM Mariner seaplane in the open water of eastern Glacier Bight on January 11, 1947 to rescue six survivors of a December 30 Mariner crash on Noville Peninsula.
The Smith Peninsula is an ice-covered, "dog-legged" peninsula 25 nautical miles long and 10 nautical miles wide, extending in an easterly direction between Keller Inlet and Nantucket Inlet from the east coast of Palmer Land, Antarctica.
Thurston Glacier is a glacier about 28 km (17 mi) long which drains the south-eastern slopes of Mount Siple on Siple Island. The glacier trends eastward and then east-north-eastward to reach the northern shore of the island. It was mapped by the United States Geological Survey (USGS) from surveys and United States Navy aerial photography, 1959–65.
