Graystone Peak
| Graystone Peak | |
|---|---|
 Northwest aspect, from Molas Lake | |
| Highest point | |
| Elevation | 13,489 ft (4,111 m)[1][2] |
| Prominence | 502 ft (153 m)[3] |
| Parent peak | Arrow Peak (13,809 ft)[3] |
| Isolation | 0.56 mi (0.90 km)[3] |
| Coordinates | 37°41′21″N 107°37′09″W / 37.6892161°N 107.6191513°W[4] |
| Geography | |
  Graystone Peak Location in Colorado  Graystone Peak Graystone Peak (the United States) | |
| Country | United States |
| State | Colorado |
| County | San Juan County |
| Protected area | Weminuche Wilderness |
| Parent range | Rocky Mountains San Juan Mountains Needle Mountains[2] |
| Topo map | USGS Storm King Peak |
| Geology | |
| Rock age | Statherian |
| Rock type | Quartzite |
| Climbing | |
| Easiest route | class 2 hiking[3] |
Graystone Peak is a 13,489-foot-elevation (4,111-meter) mountain summit located in San Juan County, Colorado, United States.
Description
Graystone Peak is situated 8.5 miles (13.7 km) south-southeast of the community of Silverton in the Weminuche Wilderness, on land managed by San Juan National Forest. It is part of the Needle Mountains which are a subrange of the San Juan Mountains.[2] Precipitation runoff from the mountain drains into tributaries of the Animas River. Topographic relief is significant as the summit rises 4,800 feet (1,500 meters) above the river in two miles (3.2 km) and 2,890 feet (880 meters) above Tenmile Creek in 0.85 mile (1.37 km). It is set six miles west of the Continental Divide, 0.7 mile south of Electric Peak, and one mile east-southeast of Mount Garfield. These three peaks can be seen from U.S. Route 550 at Molas Lake. The mountain's toponym has been officially adopted by the United States Board on Geographic Names,[4] and was recorded in publications as early as 1906.[5]
Climate
According to the Köppen climate classification system, Graystone Peak is located in an alpine subarctic climate zone with very long, cold, snowy winters, and cool to warm summers.[6] Due to its altitude, it receives precipitation all year, as snow in winter and as thunderstorms in summer, with a dry period in late spring.
Geology
Graystone Peak is part of the Uncompahgre Formation,[7] which is a sequence of quartzite and black phyllite some 8,200 feet (2,500 meters) in thickness.[8] The formation dates to the Statherian period and is interpreted as metamorphosed marine and fluvial sandstone, mudstone, and shale. The formation overlies plutons with an age of 1,707 million years.
Gallery
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Electric Peak, Graystone Peak (center), Mt. Garfield (right) viewed from Molas Lake -
Electric Peak, Graystone Peak (center), Mt. Garfield (right) from Molas Lake -
Electric Peak, Graystone Peak (center), Mt. Garfield (right) -
Northeast aspect of Arrow Peak to left, Graystone Peak centered and Electric Peak to right -
Graystone Peak to the right -
Graystone Peak centered
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See also
References
- ^ Robert F. Rosebrough, The San Juan Mountains: A Climbing & Hiking Guide, Cordillera Press, 1986, page 170.
- ^ a b c "Graystone Peak, Colorado". Peakbagger.com. Retrieved May 24, 2023.
- ^ a b c d "Graystone Peak - 13,503' CO". listsofjohn.com. Retrieved May 24, 2023.
- ^ a b "Graystone Peak". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved May 24, 2023.
- ^ Henry Gannett, United States Geological Survey (1906), A Gazetteer of Colorado, US Government Printing Office, p. 80.
- ^ Peel, M. C.; Finlayson, B. L.; McMahon, T. A. (2007). "Updated world map of the Köppen−Geiger climate classification". Hydrol. Earth Syst. Sci. 11. ISSN 1027-5606.
- ^ Colorado Needle Mountains Quadrangle, Charles D. Walcott, U.S. Geological Survey, 1906.
- ^ Rob Blair, Tom Ann Casey, William H. Romme, The Western San Juan Mountains: Their Geology, Ecology, and Human History, 1996, University Press of Colorado, ISBN 9780870813788, page 350.
External links
- Weather forecast: Graystone Peak
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