Porcupine Ridge
Climate
Based on the Köppen climate classification, Porcupine Ridge is located in an alpine subarctic climate zone characterized by long, usually very cold winters, and short, cool to mild summers. Winter temperatures can drop below −10 °F with wind chill factors below −20 °F. This climate supports the remnant of an unnamed glacier on the northeast aspect below the summit.
Geology
Like the mountains in Glacier National Park, Porcupine Ridge is composed of sedimentary rock laid down during the Precambrian to Jurassic periods. Formed in shallow seas, this sedimentary rock was initially uplifted beginning 170 million years ago when the Lewis Overthrust fault pushed an enormous slab of precambrian rocks 3 mi (4.8 km) thick, 50 miles (80 km) wide and 160 miles (260 km) long over younger rock of the cretaceous period.
Gallery
See also
- List of mountains and mountain ranges of Glacier National Park (U.S.)
- Geology of the Rocky Mountains
References
- ^ "Porcupine Ridge, Montana". Peakbagger.com. Retrieved 2021-10-18.
- ^ "Porcupine Ridge - 9,128' MT". listsofjohn.com. Retrieved 2021-10-18.
- ^ "Porcupine Ridge". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved 2021-10-18.
- ^ Peel, M. C.; Finlayson, B. L.; McMahon, T. A. (2007). "Updated world map of the Köppen−Geiger climate classification" (PDF). Hydrol. Earth Syst. Sci. 11 (5): 1633–1644. Bibcode:2007HESS...11.1633P. doi:10.5194/hess-11-1633-2007. ISSN 1027-5606. S2CID 9654551.
- ^ Scribner's Magazine, Volume 65, 1919, page 397.
- ^ Gadd, Ben (2008). Geology of the Rocky Mountains and Columbias.
External links
- Weather forecast: Porcupine Ridge
- National Park Service web site: Glacier National Park
- Porcupine Ridge fire lookout (photo): Flickr