Mount Andrus

Mount Andrus
Aerial view of the Ames Range. Mount Andrus is the first mount from the left, excluding Mount Berlin, which can be seen isolated far away
Highest point
Elevation	2,978 m (9,770 ft)
Coordinates	75°48′0″S 132°18′0″W
Geography
Mount Andrus Marie Byrd Land, Antarctica
Parent range	Ames Range
Geology
Age of rock	middle Miocene - Holocene
Mountain type	Shield volcano
Volcanic field	Marie Byrd Land Volcanic Province

Mount Andrus (75°48′0″S 132°18′0″W) is a peak 2 nautical miles (3.7 km; 2.3 mi) southeast of Mount Boennighausen in the southeast extremity of the Ames Range, in Marie Byrd Land, Antarctica.

Mapping and name

Mount Andrus was mapped by the United States Geological Survey (USGS) from surveys and United States Navy air photographs, 1964–68. It was named by the United States Advisory Committee on Antarctic Names (US-ACAN) for Lt. Carl H. Andrus, United States Navy, medical officer and Officer-in-Charge of Byrd Station in 1964.

Geology

Mount Andrus is the youngest of the shield volcanoes in the Ames Range, which formed during the Miocene. Late-stage volcanic activity resumed at Mount Andrus in the late Pleistocene or the Holocene. Its has a 4.5 kilometres (2.8 mi) wide caldera at its summit. While the age of Mt. Andrus is not well known it is one of the oldest trachytic shield volcanoes in Marie Byrd Land, similar in age to Mount Hampton. The westward face of the mountain is drained by the Coleman Glacier, with significant crevassing present.

Topographic map of the Ames Range (1:250,000 scale) from USGS Mount Kosciusko

Sources

• Alberts, Fred G., ed. (1995), Geographic Names of the Antarctic (PDF) (2 ed.), United States Board on Geographic Names, retrieved 2023-12-03  This article incorporates public domain material from websites or documents of the United States Board on Geographic Names.
• Andrus, Smithsonian Institution, retrieved 2024-04-16
• Le Masurier, W. E.; Thomson, J.W., eds. (1990), "B. 12. Ames Range", Volcanoes of the Antarctic Plate and Southern Oceans, Antarctic Research Series vol 48, Washington, DC: American Geophysical Union, pp. 216–220, doi:10.1029/AR048, ISBN 9781118664728