Mount Sanford
From Wikipedia, the free encyclopedia
| Mount Sanford | |
|---|---|
 Mount Sanford (left) and Mount Wrangell in 1981 |
|
| Elevation | 16,237 ft (4,949 m) |
| Location | Alaska, USA |
| Range | Wrangell Mountains |
| Prominence | 7,637 ft (2,328 m) |
| Coordinates | |
| Topo map | USGS Gulkana A-1 |
| Type | Shield volcano |
| Age of rock | Holocene |
| Last eruption | 320,000 bp |
| First ascent | 1938 by Terris Moore and Bradford Washburn |
| Easiest route | Sheep Glacier Route |
Mount Sanford is a shield volcano in the Wrangell Volcanic Field, in eastern Alaska near the Copper River. It is the third highest volcano in the United States behind Mount Bona and Mount Blackburn. The south face of the volcano, at the head of the Sanford Glacier, rises 8,000 ft in one mile (2,400 m in 1,600 m) resulting in one of the steepest gradients in North America.
[edit] Geology
Mount Sanford is mainly composed of andesite, and is an ancient peak, being mostly of Pleistocene age, although some of the upper parts of the mountain may be of Holocene age. The mountain first began developing 900,000 years ago, when it began growing on top of three smaller shield volcanoes that had coalesced. Two notable events in the mountain's history include a large lava flow which traveled some 18 km to the north east of the peak, and a flow erupted from a rift zone on the flank of the volcano some 320,000 years ago, which was basaltic in nature, marking the most recent dated activity of the volcano. The flow was dated using radiometric methods.
[edit] History
The mountain was named in 1885 by Lt. Henry T. Allen of the U.S. Army after the Sanford family (Allen was a descendant of Reuben Sanford). On March 12, 1948, Northwest Airlines Flight 4422 crashed into Mount Sanford. All 24 passengers and 6 crew members were killed. The wreckage was quickly covered by snow and was not found again until 1999.
[edit] References
- Richter, Donald H.; Danny S. Rosenkrans and Margaret J. Steigerwald (1995). Guide to the Volcanoes of the Western Wrangell Mountains, Alaska. USGS Bulletin 2072.
- Winkler, Gary R. (2000). A Geologic Guide to Wrangell—Saint Elias National Park and Preserve, Alaska: A Tectonic Collage of Northbound Terranes. USGS Professional Paper 1616. ISBN 0-607-92676-7.
- Richter, Donald H.; Cindi C. Preller, Keith A. Labay, and Nora B. Shew (2006). Geologic Map of the Wrangell-Saint Elias National Park and Preserve, Alaska. USGS Scientific Investigations Map 2877.
- Wood, Charles A.; Jürgen Kienle, eds. (1990). Volcanoes of North America. Cambridge University Press. ISBN 0-521-43811-X.
[edit] External links
- Maps and aerial photos
- WikiSatellite view at WikiMapia
- Topographic map from TopoZone
- Aerial image from TerraServer-USA
- Surrounding area map from Google Maps
- Location in the United States from the Census Bureau
- Siebert L, Simkin T (2002-). Volcanoes of the World: an Illustrated Catalog of Holocene Volcanoes and their Eruptions. Smithsonian Institution, Global Volcanism Program Digital Information Series, GVP-3, (http://www.volcano.si.edu/world/).
- Alaska Volcano Observatory
