Sullivan 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...

 flowing west into Gilbert Glacier

Gilbert Glacier

Gilbert Glacier is a glacier about 20 nautical miles long flowing south from Nichols Snowfield into Mozart Ice Piedmont, Alexander Island....

, immediately south of Elgar Uplands

Elgar Uplands

Elgar Uplands are uplands rising to 1,900 m, between Tufts Pass to the north and Sullivan Glacier to the south, in the north part of Alexander Island. First photographed from the air and roughly mapped by the British Graham Land Expedition in 1937...

 in the north part of Alexander Island

Alexander Island

Alexander Island or Alexander I Island or Alexander I Land or Alexander Land is the largest island of Antarctica, with an area of lying in the Bellingshausen Sea west of the base of the Antarctic Peninsula, from which it is separated by Marguerite Bay and George VI Sound. Alexander Island lies off...

. First seen from a distance by 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...

 (BGLE) during a flight in 1937 and roughly mapped. Remapped from air photos taken by the Ronne Antarctic Research Expedition

Ronne Antarctic Research Expedition

The Ronne Antarctic Research Expedition was an expedition from 1947-1948 which researched the area surrounding the head of the Weddell Sea in Antarctica.-Background:...

 (RARE), 1947–48, by Searle of the Falkland Islands Dependencies Survey (FIDS) in 1960. In association with the names of other composers in this area, named by United Kingdom Antarctic Place-Names Committee (UK-APC) after Sir Arthur Sullivan (1842–1900), English composer.