Bentley subglacial moat
| Bentley subglacial moat | ||
|---|---|---|
| location | Marie Byrd Land , West Antarctica | |
| Geographical location | 80 ° 0 ′ 0 ″ S , 105 ° 0 ′ 0 ″ W | |
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The Bentley Subglacial Trench ( English Bentley Subglacial Trench ) is a depression completely covered by glacial ice in the West Antarctic Marie Byrd Land . It lies south of the Byrd subglacial basin and is separated from it by a subglacial ridge , apart from a passage at the common eastern end . From this passage near the Ellsworth Mountains the trench extends in southwestern west direction along the north edge of the Ellsworth Subglazialhochlands to a position of "81 ° 0 S , 120 ° 0 ' W . Its lowest point is 80 ° 19 ′ S , 110 ° 5 ′ W and is 2496 m below sea level . It was considered the world's deepest non-submarine geomorphological depression until a canyon with a depth of around 3500 m below sea level was discovered under the Denman Glacier in Queen Marie Land in East Antarctica .
Its extent was determined by sonar tracking as part of a joint program of the Scott Polar Research Institute , the National Science Foundation and Denmark's Technical University between 1967 and 1979. The Advisory Committee on Antarctic Names named it in 1961 after the American geophysicist Charles Bentley (1929-2017), who discovered this trench during surveys between 1957 and 1958 from the Byrd station .
Web links
- Bentley Subglacial Trench in the Geographic Names Information System of the United States Geological Survey (English)
- Bentley Subglacial Trench on geographic.org (English)
Individual evidence
- ↑ Landsat Image Mosaic Of Antarctica: Antarctica in context (PDF; 9.5 MB; English, accessed on November 29, 2016).