Stephenson Bastion () is a

mountain A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher t ...

massif with steep rock cliffs on its south side, rising to in the south-central part of the

Shackleton Range The Shackleton Range () is a mountain range in Antarctica that rises to and extends in an east–west direction for about between the Slessor and Recovery Glaciers. Surveys The Commonwealth Trans-Antarctic Expedition (CTAE), which in 1956 s ...

. It was first mapped in 1957 by the

Commonwealth Trans-Antarctic Expedition The Commonwealth Trans-Antarctic Expedition (CTAE) of 1955–1958 was a Commonwealth-sponsored expedition that successfully completed the first overland crossing of Antarctica, via the South Pole. It was the first expedition to reach the South ...

, and it was photographed by

U.S. Navy The United States Navy (USN) is the maritime service branch of the United States Department of Defense. It is the world's most powerful navy with the largest displacement, at 4.5 million tons in 2021. It has the world's largest aircraft ...

aircraft in 1967. It was named by the

United Kingdom Antarctic Place-Names Committee The UK Antarctic Place-Names Committee (or UK-APC) is a United Kingdom government committee, part of the Foreign and Commonwealth Office, responsible for recommending names of geographical locations within the British Antarctic Territory (BAT) and ...

(UK-APC) for Philip J. Stephenson, an Australian geologist with the transpolar party of the CTAE in 1956–58.

Features

Features of the massif that are named on the 1983

United States Geological Survey The United States Geological Survey (USGS), founded as the Geological Survey, is an agency of the U.S. Department of the Interior whose work spans the disciplines of biology, geography, geology, and hydrology. The agency was founded on Mar ...

map are (west to east):

Mount Greenfield

. Ice-free mountain rising to and surmounting the west extremity of Stephenson Bastion in the Shackleton Range. Mapped in 1957 by the CTAE and named after George C. Greenfield, literary agent of the CTAE, 1955-58.

Clayton Ramparts

. A line of east–west cliffs rising to over at the south margin of

Fuchs Dome Fuchs Dome () is a large ice-covered dome rising over , between Stratton Glacier and Gordon Glacier in the central part of the Shackleton Range, Antarctica. Exploration It was first mapped in 1957 by the Commonwealth Trans-Antarctic Expeditio ...

, Shackleton Range. Surveyed by the CTAE, 1957, photographed from the air by the U.S. Navy, 1967, and further surveyed by BAS, 1968-71. Named by the UK-APC after Charles A. Clayton, BAS surveyor, Halley Station, 1969-71, who worked in the area.

Ram Bow Bluff

. Prominent rock bluff on the east side of Stephenson Bastion in the south-central part of the Shackleton Range. First visited by the CTAE in 1957 and given this descriptive name because of the feature's resemblance to the ram bow of an old battleship.

References

Sources

* * {{Portal bar, Geography Mountains of Coats Land