Transition Glacier () is a

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

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, Antar ...

, 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, to Niznik Island, ...

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. It ...

along the north side of

Block Mountain Fault blocks are very large blocks of rock, sometimes hundreds of kilometres in extent, created by tectonic and localized stresses in Earth's crust. Large areas of bedrock are broken up into blocks by faults. Blocks are characterized by relat ...

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 a polar explorer from the United States and a major benefactor of the American Museum of Natural History. Biography Lincoln Ellsworth was born on May 12, 1880, to James Ellsworth and Eva ...

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 British Antarctic Survey (BAS) is the United Kingdom's national polar research institute. It has a dual purpose, to conduct polar science, enabling better understanding of global issues, and to provide an active presence in the Antarctic on ...

, 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