Cosho Peak (8,332 feet (2,540 m)) is in North Cascades National Park in the U.S. state of Washington.[3] Cosho Peak is a summit along a ridge known as Ragged Ridge and the Kimtah Glacier is on the northeast slopes of the peak.
| Cosho Peak | |
|---|---|
 Cosho Preak (left) and Kimtah Peak (right) | |
| Highest point | |
| Elevation | 8,332 ft (2,540 m)[1] |
| Prominence | 492 ft (150 m)[1] |
| Coordinates | 48°35′20″N 120°55′36″W / 48.58889°N 120.92667°W[2] |
| Geography | |
  Cosho Peak Location in Washington  Cosho Peak Location in the United States | |
| Location | Skagit County, Washington, U.S. |
| Parent range | Cascade Range |
| Topo map | USGS Mount Logan |
Climate
editCosho Peak is located in the marine west coast climate zone of western North America.[4] Most weather fronts originate in the Pacific Ocean, and travel northeast toward the Cascade Mountains. As fronts approach the North Cascades, they are forced upward by the peaks of the Cascade Range, causing them to drop their moisture in the form of rain or snowfall onto the Cascades (Orographic lift). As a result, the west side of the North Cascades experiences high precipitation, especially during the winter months in the form of snowfall. During winter months, weather is usually cloudy, but, due to high pressure systems over the Pacific Ocean that intensify during summer months, there is often little or no cloud cover during the summer.[4]
Geology
editThe North Cascades features some of the most rugged topography in the Cascade Range with craggy peaks and ridges, deep glacial valleys, and granite spires. Geological events occurring many years ago created the diverse topography and drastic elevation changes over the Cascade Range leading to various climate differences.
The history of the formation of the Cascade Mountains dates back millions of years ago to the late Eocene Epoch.[5] With the North American Plate overriding the Pacific Plate, episodes of volcanic igneous activity persisted.[5] In addition, small fragments of the oceanic and continental lithosphere called terranes created the North Cascades about 50 million years ago.[5]
During the Pleistocene period dating back over two million years ago, glaciation advancing and retreating repeatedly scoured the landscape leaving deposits of rock debris.[5] The U-shaped cross section of the river valleys is a result of recent glaciation. Uplift and faulting in combination with glaciation have been the dominant processes which have created the tall peaks and deep valleys of the North Cascades area.
References
edit- ^ a b "Cosho Peak, Washington". Peakbagger.com. Retrieved April 28, 2013.
- ^ "Cosho Peak". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved April 28, 2013.
- ^ Mount Logan, WA (Map). TopoQwest (United States Geological Survey Maps). Retrieved April 28, 2013.
- ^ a b Beckey, Fred W. Cascade Alpine Guide, Climbing and High Routes. Seattle, WA: Mountaineers Books, 2008.
- ^ a b c d Kruckeberg, Arthur (1991). The Natural History of Puget Sound Country. University of Washington Press.