Pentagon Mountain

Edit links
Coordinates: 47°55′38″N 113°07′29″W / 47.92728212°N 113.12481885°W / 47.92728212; -113.12481885
Source: Wikipedia, the free encyclopedia.
Pentagon Mountain
Aerial view of east aspect
Highest point
Elevation8,873 ft (2,704 m)[1]
Prominence1,353 ft (412 m)[1]
Parent peakThree Sisters, North (8,900 ft)[2]
Isolation10.86 mi (17.48 km)[2]
Coordinates47°55′38″N 113°07′29″W / 47.92728212°N 113.12481885°W / 47.92728212; -113.12481885[3]
Geography
Pentagon Mountain is located in Montana
Pentagon Mountain
Pentagon Mountain
Location in Montana
Pentagon Mountain is located in the United States
Pentagon Mountain
Pentagon Mountain
Location in the United States
Location
Flathead Range
Trilobite Range
Topo mapUSGS Pentagon Mountain
Geology
Age of rockPrecambrian
Type of rockSedimentary rock

Pentagon Mountain is an 8,873-foot (2,704-metre) mountain summit located in Flathead County of the U.S. state of Montana.[3]

Description

Pentagon Mountain is the highest point in the Trilobite Range, which is a subset of the

topographic relief is significant as the summit rises approximately 3,000 feet (910 meters) above Pentagon Creek in approximately one mile. Precipitation runoff from the mountain drains west and south to the Spotted Bear River via Pentagon Creek, and north to the Middle Fork Flathead River via Clack Creek. The nearest higher neighbor is Three Sisters, 10.56 miles (16.99 km) to the south.[1]

Climate

Based on the Köppen climate classification, Pentagon Mountain is located in a subarctic climate zone characterized by long, usually very cold winters, and short, cool to mild summers.[4] Winter temperatures can drop below −10 °F with wind chill factors below −30 °F.

Geology

Pentagon Mountain 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.[5]

Gallery

See also

References

  1. ^ a b c d "Pentagon Mountain, Montana". Peakbagger.com. Retrieved 2021-10-27.
  2. ^ a b "Pentagon Mountain - 8,873' MT". listsofjohn.com. Retrieved 2021-10-27.
  3. ^ a b "Pentagon Mountain". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved 2021-10-27.
  4. S2CID 9654551
    .
  5. ^ Gadd, Ben (2008). "Geology of the Rocky Mountains and Columbias". {{cite journal}}: Cite journal requires |journal= (help)

External links

Retrieved from "https://en.wikipedia.org/w/index.php?title=Pentagon_Mountain&oldid=1163211236"