Transition Glacier () is a

glacier A glacier (; or ) is a persistent body of dense ice, a form of rock, that is constantly moving downhill under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires ...

extending along the east coast of

Alexander Island 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, Antarcti ...

, 8 nautical miles (15 km) long and 2 nautical miles (3.7 km) wide, which flows east into the

George VI Ice Shelf The George VI Ice Shelf () is an extensive ice shelf that occupies George VI Sound which separates Alexander Island from Palmer Land in Antarctica. The ice shelf extends from Ronne Entrance, at the southwest end of the sound (geography), sound, ...

that occupies

George VI Sound George VI Sound or Canal Jorge VI or Canal Presidente Sarmiento or Canal Seaver or King George VI Sound or King George the Sixth Sound is a major bay/ fault depression, 300 miles (483 km) long and mainly covered by a permanent ice shelf. I ...

along the north side of Block Mountain and Tilt Rock. The glacier was first photographed from the air on November 23, 1935, by

Lincoln Ellsworth Lincoln Ellsworth (May 12, 1880 – May 26, 1951) was an American polar explorer, engineer, surveyor, and author. He led the first Arctic and Antarctic air crossings. Early life Linn Ellsworth was born in Chicago, Illinois on May 12, 1880. His ...

and mapped from these photos by

W.L.G. Joerg Wolfgang Louis Gottfried Joerg, better known as W. L. G. Joerg (February 6, 1885 – January 7, 1952), was an American geographer, and in particular an expert in the geography of the Arctic and Antarctic regions, who exercised broad influence on the ...

. Surveyed in 1949 by the

Falkland Islands Dependencies Survey The Falkland Islands and Dependencies Aerial Survey Expedition (FIDASE) was an aerial survey of the Falkland Islands Dependencies The Falkland Islands Dependencies was the constitutional arrangement from 1843 until 1985 for administering the v ...

, and so named by them because this glacier marks the transition between igneous rocks to the north and sedimentary rocks to the south.

See also