Tumble 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#Glaciology, ablation over many years, often Century, centuries. It acquires dis ...

extending along the east side 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, Antarc ...

Antarctica Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest contine ...

, 7 nautical miles (13 km) long and 3 nautical miles (6 km) wide, which flows east from the cliffs of

Mount Egbert Mount Egbert () is a mainly ice-covered mountain, high, south-southeast of Mount Stephenson in the Douglas Range of Alexander Island, Antarctica. It was possibly first seen in 1909 by the French Antarctic Expedition under Jean-Baptiste Charco ...

Mount Ethelwulf Mount Ethelwulf () is a mainly ice-covered mountain, high, standing between Mount Egbert and Mount Ethelred at the head of Tumble Glacier, in the Douglas Range of northeast Alexander Island, Antarctica. The mountain was probably first observed ...

and

Mount Ethelred Mount Ethelred () is a mainly ice-covered mountain, high, southeast of Mount Ethelwulf and inland from George VI Sound, in the Douglas Range of Alexander Island, Antarctica. The mountain was probably first observed by Lincoln Ellsworth, who ...

of the

Douglas Range The Douglas Range () is a sharp-crested range, with peaks rising to 3,000 metres, extending 120 km (75 mi) in a northwest–southeast direction from Mount Nicholas to Mount Edred and forming a steep east escarpment of Alexander Island ...

into the west side of 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 ...

immediately south of Mount King. The glacier was first roughly surveyed in 1936 by the British Graham Land Expedition under Rymill. Resurveyed in 1948 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 of the extremely broken condition of the lower reaches of the glacier.

See also