| Abstract: | A possible example of a very deep glacial excavation is provided by a distinctive gravity low located at the front of a valley glacier that once flowed into glacial Lake Aniuk (formerly Lake Noatak) in the western Brooks Range. Geologic and geophysical data suggest that sediments or ice filling a glacially excavated valley are the most probable cause of the 30-50 mGal anomaly. Reasonable choices of geometric models and density contrasts indicate that the former excavation is now filled with a buried-ice thickness of 700 m or sediment thicknesses greater than 1 km. No direct evidence of efficient excavation was observed in Greenland, but efficient glacial erosion behind a floating polar ice tongue could explain the excavation that caused the Alaskan gravity anomaly. -from Author |
| Genre: | Article |
| ProdID: | 70014264 |
| Citation Author: | Barnes, D. F. |
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| Citation End Page: | 8984 |
| Citation Issue: | B9 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Geophysical Research |
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| Citation Number Of Pages: | 9 |
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| Citation Search Results Text: | Gravity anomaly at a Pleistocene lake bed in NW Alaska interpreted by analogy with Greenland‘s Lake Taserssauq and its floating ice tongue; 1987; Article; Journal; Journal of Geophysical Research; Barnes, D. F. |
| Citation Start Page: | 8976 |
| Citation Volume: | 92 |
| Citation Year: | 1987 |
| Type: | citation/reference |
| Text: | Gravity anomaly at a Pleistocene lake bed in NW Alaska interpreted by analogy with Greenland‘s Lake Taserssauq and its floating ice tongue; 1987; Article; Journal; Journal of Geophysical Research; Barnes, D. F. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1987 00:00 -0600 |
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