Isocline Hill (83°31′S157°36′E) is a hill in the southern part of the Augen Bluffs, in the Miller Range, Antarctica. The hill rises 100 to 200 metres (330 to 660 ft) above the west side of Marsh Glacier and is connected to the Augen Bluffs by a col…
Island Lake is a lake lying southeast of Skua Lake at Cape Evans, Ross Island, Antarctica.
Ishmael Peak (65°53′S62°25′W) is a conspicuous detached rock peak in eastern Voden Heights, 4 miles (6.4 km) south of Spouter Peak, which marks the north side of the mouth of Leppard Glacier, on the east coast of Graham Land, Antarctica.
Isfossnipa Peak (73°9′S1°30′W) is a peak 2 miles (3 km) southeast of Austvorren Ridge, surmounting the eastern part of the Neumayer Cliffs in Queen Maud Land, Antarctica. It was photographed from the air by the Third German Antarctic Expedition (19…
Isdalsegga Ridge (71°45′S12°33′E) is a rock ridge surmounted by Pinegin Peak, forming the east wall of Isdalen Valley in the Südliche Petermann Range of the Wohlthat Mountains, Antarctica.
Isbul Point (Bulgarian: нос Исбул, ‘Nos Isbul’ \'nos is-'bul\) is a narrow rocky point projecting 600 m from the coast of Ray Promontory into Svishtov Cove in the northwest extremity of Byers Peninsula, Livingston Island in the South Shetland Island…
Isbrynet Hill (73°9′S4°28′W) is a rock hill southwest of Penck Ledge, rising above the ice slopes at the west side of the head of Penck Trough in Queen Maud Land, Antarctica.
Isakson Nunatak (74°50′S73°42′W) is a nunatak rising to about 1,300 metres (4,300 ft), 1.5 miles (2.4 km) southeast of Christoph Nunatak in the Lyon Nunataks of Palmer Land, Antarctica. It was mapped by the United States Geological Survey from surv…
Isacke Passage (66°54′S67°15′W) is a marine channel in Hanusse Bay between Liard Island and Arrowsmith Peninsula on the west coast of Graham Land, Antarctica. It was discovered and first charted by the French Antarctic Expedition, 1908–10, under Je…
Isachsen Mountain is a large mountain rising to 2,750 metres (9,020 ft), standing 4 miles (6.4 km) southeast of Mount Bergersen in the Sør Rondane Mountains of Antarctica. It was mapped by Norwegian cartographers in 1957 from air photos taken by U.S…
Irving Island (66°25′S67°4′W) is a small island at the northeastern end of the Barcroft Islands, in the Biscoe Islands, Antarctica.
Irnik Point (Bulgarian: нос Ирник, ‘Nos Irnik’ \'nos ir-'nik\) is the ice-free point on the northwest coast of Snow Island in the South Shetland Islands, Antarctica situated 3.5 km southwest of Cape Timblón, 2 km southwest of Mezdra Point, and 7.4&#…
Irizar Island (65°13′S64°12′W) is an island 0.8 km (0.5 mi) long, lying 0.80 km (0.5 mi) northeast of Uruguay Island in the northeastern part of the Argentine Islands, in the Wilhelm Archipelago, Antarctica. It was discovered by the French Antarcti…
Iratais Point (Nos Iratais \'nos i-ra-'ta-is\) is a point forming both the south extremity and the vertex of the V-shaped Desolation Island situated in the entrance to Hero Bay, Livingston Island, Antarctica.
Irakli Peak (Bulgarian: връх Иракли, ‘Vrah Irakli’ \'vr&h i-rak-'li\) is the peak rising to 1336 m in the northwest part of Trakiya Heights on Trinity Peninsula, Antarctic Peninsula. Situated 1.43 km northeast of Antonov Peak, 3.24 km southwest of M…
Iquique Cove is a small, 400 m (440 yd) wide cove indenting for 700 m (770 yd) the east coast of Discovery Bay, Greenwich Island in the South Shetland Islands, Antarctica. Iquique Cove is sheltered on the northwest by Guesalaga Peninsula, and the sm…
Ionosphere Bay is a small bay bordering the east side of Cape Découverte, Antarctica.
Inverleith Harbour is a small bay between Andrews Point and Briggs Peninsula along the northeast coast of Anvers Island, in the Palmer Archipelago, Antarctica. It was presumably discovered by whalers working in this area who gave the name "Inverleit…
Intrusive Spur (73°30′S94°25′W) is a rock spur along the north front of the Jones Mountains, Antarctica, 1 mile (1.6 km) west of Avalanche Ridge.
The Intention Nunataks (72°56′S163°46′E) are a group of peaked nunataks between Solo Nunatak and the Forgotten Hills, at the southwestern margin of Evans Névé, Antarctica. They were named by the northern party of the New Zealand Geological Survey A…
Insteodden Point (69°58′S38°46′E) is a rock point along the east side of Havsbotn, lying 1 mile (1.6 km) southwest of Strandnebba at the extreme southeast corner of Lützow-Holm Bay.
The Instekleppane Hills are a group of low rock hills that protrude above the ice slopes at the east side of Shirase Glacier, just south of the southeastern extremity of Lützow-Holm Bay in Antarctica.
The Insel Range (77°24′S161°18′E) is a series of ice-free flat-topped peaks resembling islands which rise above the surrounding terrain and separate McKelvey Valley from Balham Valley, in Victoria Land, Antarctica.
Inott Point (62°31′31″S60°00′17″W) is a point 1 nautical mile (2 km) north-northeast of Edinburgh Hill forming the eastern extremity of Varna Peninsula on Livingston Island in the South Shetland Islands, Antarctica.
Innhovde Point (69°52′S37°10′E) is a lone bare rock point located along the inner, icefilled shore of Fletta Bay, on the southwest side of Lützow-Holm Bay, Antarctica.
Inner Harbor (64°19′S63°0′W) is a small harbor in the Melchior Islands, Palmer Archipelago, Antarctica, formed by the semi-circular arrangement of Lambda, Epsilon, Alpha and Delta Islands.
Inner Crater (77°32′S167°10′E) is the topographic feature that embraces the crater within the floor of Main Crater, at the summit of Mount Erebus, Ross Island, Antarctica. Inner Crater contains an active anorthoclase–phonolite lava lake.
Inman Nunatak (74°49′S98°54′W) is a nunatak standing 6 miles (10 km) east of Mount Manthe in the southeastern part of the Hudson Mountains, Antarctica. It was mapped by the United States Geological Survey from surveys and U.S. Navy air photos, 1960…
The Inland Forts (77°37′S161°8′E) are a line of peaks extending between Northwest Mountain and Saint Pauls Mountain, in the Asgard Range of Victoria Land, Antarctica. Taylor Glacier lies to the south.
Inferno Ridge (79°26′S84°13′W) is a narrow ridge, 8 miles (13 km) long, rising between Schneider Glacier and Rennell Glacier in the Heritage Range, Antarctica.
Inferno Peak (72°7′S165°59′E) is a peak 3 miles (5 km) north of Le Couteur Peak in the northern end of the Millen Range, Antarctica.
Indicator Island (65°15′S64°16′W) is an island 0.16 km (0.1 mi) long, lying 0.16 km (0.1 mi) west of the northwest end of Galindez Island in the Argentine Islands, Wilhelm Archipelago, Antarctica. It was charted and named in 1935 by the British Gra…
Index Peak (65°49′S64°26′W) is a peak over 1,220 metres (4,000 ft) high, standing 7.5 miles (12 km) southeast of Cape Garcia on the west coast of Graham Land, Antarctica.
Imshaug Peninsula (70°53′S61°35′W) is a broad, snow-covered peninsula at the south side of Lehrke Inlet on the east coast of Palmer Land, Antarctica. It was mapped by the United States Geological Survey in 1974, and named by the Advisory Committee …
The Illusion Hills (73°29′S162°20′E) are small escarpment-like hills located between the Lichen Hills and the Vantage Hills at the head of Rennick Glacier in Victoria Land, Antarctica. They were named by the northern party of the New Zealand Geolog…
Iliev Glacier (Bulgarian: Илиев ледник, ‘Iliev Lednik’ \ i-'li-ev 'led-nik\) is the 5 km long and 1.5 km wide glacier located within the Lassus Mountains, situated in the northern portion of Alexander Island, Antarctica, draining the northwestern sl…