Yamsay Mountain
Yamsay Mountain | |
---|---|
Highest point | |
Elevation | 8,200 ft (2,499 m) NAVD 88[1] |
Prominence | 3,176 ft (968 m)[2] |
Coordinates | 42°55′50″N 121°21′39″W / 42.930599108°N 121.36074595°W[1] |
Geography | |
Location | Klamath County, Oregon, U.S. |
Parent range | Cascade Range |
Topo map | USGS Yamsay Mountain |
Geology | |
Mountain type | Shield volcano |
Climbing | |
Easiest route | Trail[3] (formerly a road) |
Yamsay Mountain is a large shield volcano in the Cascade Range of south-central Oregon, located about 35 miles (56 km) east of Crater Lake on the border between Klamath County and Lake County. It is part of the Cascade Volcanic Arc but is located in a mountain range 30 to 50 miles (50 to 80 km) behind the main Cascade volcanic front. The best known members of this enigmatic arc are the massive shields of Newberry Volcano, about 55 miles (89 km) farther north in Oregon, and Medicine Lake Volcano, about 80 miles (130 km) south in Northern California. Yamsay is the highest volcano in the eastern arc, almost 300 feet (90 m) higher than Newberry and Medicine Lake.
A central part of
Geography and geology
Like other volcanoes in the Cascade Range, Yamsay was produced by subduction of the oceanic Juan de Fuca Plate under the North American Plate.[4] Annual convergence between the two continues at a rate of 1.6 inches (4 cm) per year. The Cascades make up the majority of the North American West Coast volcanoes; they have been volcanically active for about 36 million years. The rock making up the Cascades is slightly older, dated between 55 and 42 million years old. In an attempt to organize the volcanoes by age, scientists typically divide them into two provinces: the High Cascades – the younger volcanoes – and the Western Cascades, comprising the older volcanoes.[5]
Yamsay, along with the Simcoe volcanic complex, Medicine Lake Highlands, and Newberry Volcano, make up a wayward range of shield volcanoes between 50 kilometres (31 mi) and 60 kilometres (37 mi) east of the main Cascade Range. Volcanism at these centers is unlike other eruptions in the Cascades, and it does not stem from fissures as would Basin and Range volcanism. The volcanoes appear to be isolated from the major volcanic ranges in the Northwestern United States,[6] although scientists group them as part of the Cascades.
Recent volcanism in the Cascades, lasting from 7 to 2
History
The name Yamsay is a corruption of the Klamath (a Native American tribe of Southern Oregon) 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.[8] Historically, the area by the mountain was inhabited by Klamath, Modoc, and Yahooskin Bands, all of the Snake Paiute people. The Yahooskins lived east of Yamsay Mountain, near modern-day Lakeview. Their group inhabited 22 million acres (89,000 km2) of land in Oregon and California. Traders entered the area at some point between 1825 and 1827, where they worked as trappers for the Hudson's Bay Company. After routes opened up in 1846, Fort Klamath was built (in 1863).[9]
The city of
The mountain features a United States Forest Service fire lookout tower with an 80-foot (24 m) steel tower, built on the summit of Yamsay in 1929. It was 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. The upper 3.5 miles (5.6 km) now form a hiking trail to the summit.[11]
Climate and ecology
The Cascade Range is dramatically different in climate from west to east. The west side is heavily forested and features trees such as
Diverse life exists within the range, including
Recreation
The Fremont National Recreation Trail passes through the area. It offers tourists excellent views of other Oregon Cascades landmarks, such as Mount Bachelor, the Three Sisters, Mount Thielsen, Mount Scott, and Mount Shasta, . Other activities along the trail include hiking, horseback riding, mountain biking. Yamsay Mountain is also part of a segment of the Oregon Timber Trail known as the Mazama Blowout.
References
- ^ a b "Yamsay Mt". NGS Data Sheet. National Geodetic Survey, National Oceanic and Atmospheric Administration, United States Department of Commerce. Retrieved 2008-04-03.
- ^ "Yamsay Mountain, Oregon". Peakbagger.com. Retrieved 2008-04-03.
- ^ "Yamsay Mountain". Fremont–Winema National Forest. United States Forest Service. 2005-05-02. Archived from the original on 2010-02-09.
- ^ Brantley (1994). Volcanoes of the United States: USGS General Interest Publication. United States Geological Survey.
- ^ Swanson; et al. (1989). Cenozoic Volcanism in the Cascade Range and Columbia Plateau, Southern Washington and Northernmost Oregon: AGU Field Trip Guidebook T106. United States Geological Survey.
- S2CID 128694354.
- ^ Sherrod, David R.; Smith, James G. (2000). "Geologic Map Of Upper Eocene To Holocene Volcanic And Related Rocks Of The Cascade Range, Oregon" (PDF). United States Geological Survey. Archived (PDF) from the original on 2010-08-05. Retrieved 2010-04-24.
- ^
McArthur, Lewis A.; Lewis L. McArthur (2003) [1928]. Oregon Geographic Names (Seventh ed.). ISBN 0-87595-277-1.
- ^ Zilverberg, p. 3.
- ^ Zilverberg, p. 4.
- ^ "Yamsay Mountain (OR)". SummitPost.org. Retrieved 2011-05-07.
- ^ Wuerthner, p. 74.
- ^ Wuerthner, p. 76.
- ^ Wuerthner, p. 77.
Bibliography
- Harris, Stephen L. (2005). Fire Mountains of the West: The Cascade and Mono Lake Volcanoes (3rd ed.). ISBN 0-87842-511-X.
- Hering, Carl William (1981). Geology and Petrology of the Yamsay Mountain Complex, South-Central Oregon : A Study Of Bimodal Volcanism. Ph.D. dissertation, University of Oregon.
- Kresek, Ray (1998). Fire Lookouts of the Northwest (3rd ed.). Historic Lookout Project. ISBN 0-87770-632-8.
- Wood, Charles A.; Kienle, Jürgen, eds. (1990). Volcanoes of North America. ISBN 0-521-43811-X.
- Wuerthner, George (2003). Oregon's Wilderness Areas: The Complete Guide. Big Earth Publishing. ISBN 1-56579-434-6.
- Zilverberg, Grace M. "Klamath Falls, Klamath County, Oregon" (PDF). Northwest Economic Adjustment Initiative Assessment. Archived (PDF) from the original on 2012-03-06. Retrieved 2010-04-25.
External links
- "Yamsay Mountain". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.