Chipmunk Mountain

Chipmunk Mountain
Summit of Chipmunk Mountain
Highest point
Elevation 2,390 m (7,840 ft) [1]
Prominence 540 m (1,770 ft) [1]
Coordinates 50°34′50″N 122°55′56″W / 50.58056°N 122.93222°W / 50.58056; -122.93222Coordinates: 50°34′50″N 122°55′56″W / 50.58056°N 122.93222°W / 50.58056; -122.93222 [2]
Geography
Chipmunk Mountain
Parent range Pacific Ranges
Topo map NTS 92J/10
Geology
Age of rock 26.8 ± 1.4 Ma
Volcanic arc/belt Pemberton Volcanic Belt
Canadian Cascade Arc
Last eruption Miocene age

Chipmunk Mountain is a mountain in southwestern British Columbia, Canada, located 23 km (14 mi) southwest of Bralorne. It has an elevation of 2,390 m (7,840 ft) and a topographic prominence of 540 m (1,770 ft), making it the highest point on an east-trending screed ridge. This horn-like rocky tower is similar to The Black Tusk in Garibaldi Provincial Park.

The mountain was named in 1920 by James Landsborough after a summit party had given lunch scraps to a chipmunk.[2]

Geology

Technically, Chipmunk Mountain is the remains of an extinct volcano that formed during the Miocene epoch.[2][3] The volcanic rocks comprising Chipmunk Mountain crop out in a 12 km2 (4.6 sq mi) area and consist of pyroclastic rocks, sills and dikes. These volcanic rocks range from basalts to rhyolites, with the majority classifying as basaltic andesites and andesites. They are closely related to the calc-alkaline volcanic centres of the Pemberton Volcanic Belt, indicating that the volcanic rocks comprising Chipmunk Mountain were created as a result of volcanism in the Canadian Cascade Arc. The volcanic rocks have been dated to be 26.8 ± 1.4 million years old, which correlates with the time of Pemberton Belt volcanism.[3]

See also

References

  1. 1 2 "Chipmunk Mountain". Bivouac.com. Retrieved 2012-09-16.
  2. 1 2 3 "Chipmunk Mountain". BC Geographical Names. Retrieved 2012-09-16.
  3. 1 2 Fretschmar, Laura M. (1994). "The Vermont Geological Society Spring Meeting for the Presentation of Student Papers". Miocene Volcanism in Southwestern British Columbia: Geochemistry and Tectonic Implications. The Green Mountain Geologist. 21 (1): 7, 8.
  • "Chipmunk Mountain". Geographical Names Data Base. Natural Resources Canada. Retrieved 2012-09-16.
  • "Chipmunk Mountain". Bivouac.com. Retrieved 2012-09-16.
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