Flanagan 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...

 in the Pioneer Heights

Pioneer Heights

Pioneer Heights is a group name in the Heritage Range, Ellsworth Mountains, encompassing the large area of hills, ridges and peaks located eastward of Schneider and Schanz Glaciers and between Splettstoesser and Union Glaciers. Among these features are the Inferno Ridge, the Nimbus, Gross,...

, Heritage Range

Heritage Range

The Heritage Range is a major mountain range, long and wide, situated southward of Minnesota Glacier and forming the southern half of the Ellsworth Mountains in Antarctica...

, draining east from Thompson Escarpment

Thompson Escarpment

Thompson Escarpment is a steep east-facing escarpment, 8 nautical miles long, located at the head of Flanagan Glacier in the Pioneer Heights, Heritage Range. Mapped by United States Geological Survey from surveys and U.S. Navy air photos. 1961-66. Named by Advisory Committee on Antarctic Names ...

 between Gross and Nimbus Hills

Nimbus Hills

Nimbus Hills is a rugged line of hills and peaks about 14 nautical miles long, forming the southeast part of Pioneer Heights in the Heritage Range, Ellsworth Mountains. Mapped by United States Geological Survey from ground surveys and U.S. Navy air photos, 1961-66...

 to the confluent ice at the lower end of Union Glacier

Union Glacier

Union Glacier , is a large, heavily-crevassed glacier which receives the flow of several tributaries and drains through the middle of the Heritage Range, Ellsworth Mountains, Antarctica. The glacier drains from the plateau at Edson Hills on the west side of the range and flows east between Pioneer...

. Mapped by United States Geological Survey

United States Geological Survey

The United States Geological Survey is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization has four major science disciplines, concerning biology,...

 (USGS) from surveys and U.S. Navy air photos, 1961-66. Named by Advisory Committee on Antarctic Names

Advisory Committee on Antarctic Names

The Advisory Committee on Antarctic Names is an advisory committee of the United States Board on Geographic Names responsible for recommending names for features in Antarctica...

 (US-ACAN) for Lieutenant Walter B. Flanagan, assistant maintenance officer with U.S. Navy Squadron VX-6

VX-6

Air Development Squadron Six was a United States Navy Air Development Squadron based at McMurdo Station, Antarctica...

 at McMurdo Station

McMurdo Station

McMurdo Station is a U.S. Antarctic research center located on the southern tip of Ross Island, which is in the New Zealand-claimed Ross Dependency on the shore of McMurdo Sound in Antarctica. It is operated by the United States through the United States Antarctic Program, a branch of the National...

 in Deep Freeze

Deep Freeze

Deep Freeze may refer to:* Operation Deep Freeze, a series of American expeditions to Antarctica beginning in 1955* Deep Freeze Range, a mountain range in Antarctica* Deep Freeze , a protective program...

1963 and 1964.