Icebreaker Glacier is a large valley

Valley

In geology, a valley or dale is a depression with predominant extent in one direction. A very deep river valley may be called a canyon or gorge.The terms U-shaped and V-shaped are descriptive terms of geography to characterize the form of valleys...

 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...

 10 miles (16 km) northeast of Mount Monteagle

Mount Monteagle

Mount Monteagle is a high, sharp peak standing 10 nautical miles north of Cape Sibbald in the Mountaineer Range, Victoria Land. It surmounts Aviator Glacier to the west and the large cirque of Parker Glacier to the east. Discovered in January 1841 by Sir James Clark Ross who named this peak for...

 that flows southeast from the Mountaineer Range

Mountaineer Range

Mountaineer Range is the range of mountains lying between the Mariner and Aviator Glaciers in Victoria Land, Antarctica. The seaward parts of the range were first viewed by Ross in 1841, and subsequently by several British and later American expeditions. The precise mapping of its overall features...

 to Lady Newnes Bay

Lady Newnes Bay

Lady Newnes Bay is a bay about 60 mi long in the western Ross Sea, extending along the coast of Victoria Land from Cape Sibbald to Coulman Island. Discovered by the British Antarctic Expedition, 1898–1900, led by Carstens Borchgrevink. He named it for Lady Newnes, whose husband, Sir George...

, Victoria Land

Victoria Land

Victoria Land is a region of Antarctica bounded on the east by the Ross Ice Shelf and the Ross Sea and on the west by Oates Land and Wilkes Land. It was discovered by Captain James Clark Ross in January 1841 and named after the UK's Queen Victoria...

. Below Hermes Point

Hermes Point

Hermes Point is the seaward end of a ridge from the Mountaineer Range, situated at the confluence of the Icebreaker and Fitzgerald Glaciers along the coast of Victoria Land. Mapped by United States Geological Survey from surveys and U.S. Navy air photos 1960-64. Named by Advisory Committee on...

, its flow coalesces with that of Fitzgerald Glacier

Fitzgerald Glacier

Fitzgerald Glacier is a prominent valley glacier draining to Lady Newnes Bay from the ice cascades on the south and west slopes of Mount Murchison, in Victoria Land. At the mouth it coalesces with the Icebreaker Glacier before debouching on Lady Newnes Bay...

. Named by the New Zealand Geological Survey Antarctic Expedition

New Zealand Geological Survey Antarctic Expedition

The New Zealand Geological Survey Antarctic Expedition describes a series of scientific explorations of the continent Antarctica. The expeditions were notably active in 1957-58 and again in 1958-59. The 1957-58 expedition went to the Ross Dependency and named the Borchgrevink Glacier...

 (NZGSAE), 1958–59, as a tribute to the work of the complements of U.S. Navy, and U.S. Coast Guard icebreaker

Icebreaker

An icebreaker is a special-purpose ship or boat designed to move and navigate through ice-covered waters. Although the term usually refers to ice-breaking ships, it may also refer to smaller vessels .For a ship to be considered an icebreaker, it requires three traits most...

s in Antarctic exploration, in supporting scientists and in aiding other ships.