Crary Mountains
| Crary Mountains | ||
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 Topographic map (1: 250,000) |
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| Highest peak | Mount Frakes ( 3654 m ) | |
| location | Marie Byrd Land , West Antarctica | |
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| Coordinates | 76 ° 48 ′ S , 117 ° 40 ′ W | |
The Crary Mountains are an isolated group of ice-capped mountains in Marie Byrd Land, West Antarctica . They rise from the West Antarctic Ice Sheet about 100 km southwest of Toney Mountain . These include Mount Frakes , Mount Rees , Mount Steere, and the Boyd Ridge .
The mountains are of volcanic origin and formed during the last 10 million years. Volcanic activity has progressed from northwest to southeast during this period, making Mount Rees in the northwest the oldest volcano in the Crary Mountains, while Boyd Ridge in the southeast, the youngest mountain in the group, is around 2.5 million years old. Flank volcanoes on the southwest side of Mount Frakes were active until the late Pleistocene (around 30,000 years ago).
The mountains were probably first sighted during an overflight between February 24 and 25, 1940 during the United States Antarctic Service Expedition (1939-1941) under the direction of the American polar explorer Richard Evelyn Byrd . A team led by the US geophysicist Charles Bentley , who crossed the Marie Byrd Land by land between 1957 and 1958, mapped the formation. It is named after the US geophysicist Albert P. Crary (1911–1997), deputy scientific director of the US program during the International Geophysical Year (1957–1958).
Web links
- Crary Group in the Global Volcanism Program of the Smithsonian Institution (English).
- Crary Mountains in the Geographic Names Information System of the United States Geological Survey .
- Crary Mountains on geographic.org (English).
Individual evidence
- ↑ Kurt S. Panter et al .: Geochemistry of Late Cenozoic basalts from the Crary Mountains: characterization of mantle sources in Marie Byrd Land, Antarctica . In: Chemical Geology . tape 165 , no. 3-4 , April 2000, ISSN 0009-2541 , pp. 215–241 , doi : 10.1016 / S0009-2541 (99) 00171-0 (English, freely available online through researchgate.net ).