Bolam Glacier
| Bolam Glacier | |
|---|---|
| Type | Mountain glacier |
| Location | Siskiyou County, California, USA |
| Coordinates | 41°25′14″N 122°12′7″W / 41.42056°N 122.20194°WCoordinates: 41°25′14″N 122°12′7″W / 41.42056°N 122.20194°W |
| Area | 0.4 miles² (1.1 km²) |
| Length | 1.4 miles (2.2 km) |
| Thickness | average 70 ft (21 m) |
| Terminus | moraine |
| Status | expanding |
The Bolam Glacier is a glacier situated on the northern flank of Mount Shasta, in the U.S. state of California.[1][2] It is the second longest glacier in California behind the nearby Whitney Glacier, and the fourth largest and most voluminous after the neighboring Hotlum Glacier, Whitney Glacier, and Wintun Glacier.[3]. The Bolam Glacier flows from a cirque on the north side of Mount Shasta's main summit, with the moving ice starting below a large bergschrund which spans the glacier at 12,600 ft (3,840 m)[4]. Above that, permanent snow and ice extends towards the summit to about 13,500 ft (4,100 m)[4]. The glacier flows north down a steep slope and terminates near 9,800 ft (3,000 m)[4].
In 2002, scientists made the first detailed survey of Mount Shasta's glaciers in 50 years. They found that seven of the glaciers have grown over the period 1951-2002, with the Hotlum and Wintun nearly doubling, the Bolam increasing by half, and the Whitney and Konwakiton Glaciers growing by a third.[5][6][7]
[edit] Cited references
- ^ "Existing Glaciers of Mount Shasta". College of the Siskiyous. http://www.siskiyous.edu/shasta/env/glacial/exi.htm. Retrieved 2007-01-23.
- ^ "Glaciers of California". Glaciers of the American West. Glaciers Online. Archived from the original on 2006-09-03. http://web.archive.org/web/20060903035748/http://glaciers.research.pdx.edu/california.php. Retrieved 2007-01-23.
- ^ Driedger, Carolyn L.; Kennard, Paul M. (1986). "Ice volumes on Cascade volcanoes; Mount Rainier, Mount Hood, Three Sisters, and Mount Shasta". U.S. Geological Survey Professional Paper 1365. http://pubs.er.usgs.gov/usgspubs/pp/pp1365. Retrieved 2007-03-06.
- ^ a b c Google Earth elevation for GNIS coordinates.
- ^ Harris, Stephen L. (2005). Fire Mountains of the West: The Cascade and Mono Lake Volcanoes (3rd ed.). Mountain Press Publishing Company. pp. 109. ISBN 0-87842-511-X.
- ^ Wong, Kathleen. "California Glaciers". California Wild. California Academy of Sciences. Archived from the original on 2006-10-06. http://web.archive.org/web/20061006102003/http://www.calacademy.org/calwild/2005fall/stories/glaciers.html. Retrieved 2007-01-23.
- ^ Whitney, David (2006-09-04). "A growing glacier: Mount Shasta bucks global trend, and researchers cite warming phenomena". The Bee. Archived from the original on 2007-01-21. http://web.archive.org/web/20070121071019/http://dwb.sacbee.com/content/news/story/14317368p-15234887c.html. Retrieved 2007-01-23.
[edit] See also
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