Yamsay Mountain

Yamsay Mountain

Infobox Mountain
Name = Yamsay Mountain
Photo =
Caption =
Elevation = convert|8196|ft|m| [ cite web
url = http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=NY0873
title = NGS Data Sheet for YAMSAY MT
publisher = U.S. National Geodetic Survey
accessdate = 2008-04-03
]
Location = Klamath County, Oregon, U.S.
Range =
Prominence = convert|3176|ft|m [ cite web
url = http://www.peakbagger.com/peak.aspx?pid=3255
title = Yamsay Mountain, Oregon
publisher = Peakbagger.com
accessdate = 2008-04-03
]
Coordinates = coord|42.9306949|-121.3639009|format=dms|region:US_type:mountain [GNIS|1129349accessdate|2008-04-03]
Topographic
USGS Yamsay Mountain
Type = Shield volcano
Volcanic_Arc/Belt =
Age =
Last eruption =
First ascent =
Easiest route = trail (formerly a road)

Yamsay Mountain is a large shield volcano in the Cascade Range of south-central Oregon, located about convert|35|mi|km east of Crater Lake on the border between Klamath County and Lake County. It is part of the Cascade Volcanic Arc located 30–50 miles (50–80 km) behind the main Cascade volcanic front. The best known members of this back-arc are the massive shields of Newberry Volcano about convert|55|mi|km farther north in Oregon and Medicine Lake Volcano about convert|80|mi|km south in northern California. However, Yamsay is the highest volcano in the eastern arc, topping both Newberry and Medicine Lake by less than convert|300|ft|m.

The name Yamsay Mountain is a corruption of the Klamath name "Yamsi", a form of "Yamash", meaning "north wind." This mountain was supposed to be the home of Kmukamtch, the supreme being of Klamath mythology. [cite book
last = McArthur
first = Lewis A.
authorlink =
coauthors = Lewis L. McArthur
title = Oregon Geographic Names
origyear = 1928
edition = Seventh Edition
year = 2003
publisher = Oregon Historical Society Press
location = Portland, Oregon
id = ISBN 0-87595-277-1 (trade paperback), ISBN 0-87595-278-X (hardcover)
]

Ice Age glaciers eroded several deep cirques in the northern flank of the volcano, exposing magma which hardened in the volcano's conduits to form the numerous rock pinnacles now found in the upper part of the cirque. A United States Forest Service fire lookout tower with an convert|80|ft|m steel tower was built on the summit of Yamsay in 1929, but removed after the 1970s and only remnants of the foundation remain today. A dirt road was built to the summit to service the lookout, but this was abandoned after the tower was removed and the upper convert|3.5|mi|km|1 now form a hiking or backcountry skiing trail to the summit.

References

* cite book
last = Hering
first = Carl William
title = Geology and Petrology of the Yamsay Mountain Complex, South-Central Oregon : A Study Oof Bimodal Volcanism
publisher = Ph.D. dissertation, University of Oregon
date = 1981

* cite book
last = Harris
first = Stephen L.
title = Fire Mountains of the West: The Cascade and Mono Lake Volcanoes (3rd ed.)
publisher = Mountain Press Publishing Company
date = 2005
isbn = 0-87842-511-X

* cite book
last = Wood
first = Charles A.
coauthors= Jürgen Kienle, eds.
title = Volcanoes of North America
publisher = Cambridge University Press
date = 1990
isbn = 0-521-43811-X

* cite book
last = Kresek
first = Ray
title = Fire Lookouts of the Northwest (3rd ed.)
publisher = Historic Lookout Project
date = 1998
isbn = 0-87770-632-8


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