Casey Glacier is a glacier

Glacier

A glacier is a large persistent body of ice that forms where the accumulation of snow exceeds its ablation over many years, often centuries. At least 0.1 km² in area and 50 m thick, but often much larger, a glacier slowly deforms and flows due to stresses induced by its weight...

 6 miles (10 km) wide, flowing east into Casey Inlet

Casey Inlet

Casey Inlet is an ice-filled inlet at the terminus of Casey Glacier, between Miller Point and Cape Walcott, on the east coast of Palmer Land. It was photographed from the air by Sir Hubert Wilkins in 1928, Lincoln Ellsworth in 1935 and the United States Antarctic Service in 1940. It was surveyed...

 on the east coast of Palmer Land

Palmer Land

Palmer Land is that portion of the Antarctic Peninsula which lies south of a line joining Cape Jeremy and Cape Agassiz. This application of Palmer Land is consistent with the 1964 agreement between US-ACAN and UK-APC, in which the name Antarctic Peninsula was approved for the major peninsula of...

. It was discovered by Sir Hubert Wilkins on an aerial flight of December 20, 1928. Wilkins believed the feature to be a channel cutting completely across the Antarctic Peninsula

Antarctic Peninsula

The Antarctic Peninsula is the northernmost part of the mainland of Antarctica. It extends from a line between Cape Adams and a point on the mainland south of Eklund Islands....

, naming it Casey Channel after Rt. Hon. Richard G. Casey. Correlation of aerial photographs taken by Lincoln Ellsworth

Lincoln Ellsworth

Lincoln Ellsworth was an arctic explorer from the United States.-Birth:He was born on May 12, 1880 to James Ellsworth and Eva Frances Butler in Chicago, Illinois...

 in 1935 and preliminary reports of the British Graham Land Expedition

British Graham Land Expedition

A British expedition to Graham Land led by John Lachlan Cope took place between 1920 and 1922. The British Graham Land Expedition was a geophysical and exploration expedition to Graham Land in Antarctica between 1934 to 1937. Under the leadership of John Riddoch Rymill, the expedition spent two...

, 1934–37, led W.L.G. Joerg to interpret this glacier to be what Wilkins named Casey Channel. This interpretation is borne out by the results of subsequent exploration by members of the East Base of the United States Antarctic Service in 1940.