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Edgar Peak

Edgar Peak
West aspect, centered
Highest point
Elevation7,162 ft (2,183 m)[1][2]
Prominence2,225 ft (678 m)[2]
Isolation24.53 mi (39.48 km)[2]
Coordinates34°57′20″N 115°32′11″W / 34.9555061°N 115.5362833°W / 34.9555061; -115.5362833[1]
Geography
Edgar Peak is located in California
Edgar Peak
Edgar Peak
Location in California
Edgar Peak is located in the United States
Edgar Peak
Edgar Peak
Edgar Peak (the United States)
CountryUnited States
StateCalifornia
CountySan Bernardino
Protected areaMojave National Preserve
Parent rangeProvidence Mountains
Topo mapUSGS Fountain Peak
Geology
Rock ageJurassic[3]
Mountain typeFault block
Rock typeRhyolite[3]
Climbing
Easiest routeclass 2+[2] scrambling

Edgar Peak is a 7,162-foot-elevation (2,183-meter) summit in San Bernardino County, California, United States.

Description

Edgar Peak is the highest point of the Providence Mountains and the Providence Mountains State Recreation Area.[4] It is set within the Mojave National Preserve. Precipitation runoff from this mountain's west slope drains to Kelso Wash, whereas the east slope drains to Clipper Valley. Topographic relief is significant as the summit rises 3,160 feet (963 meters) above the surrounding terrain in 1.5 miles (2.4 km). An ascent of the summit involves 4.2 miles of strenuous off-trail hiking with 3,000 feet of elevation gain, best done in cooler months from October through May.[5] This mountain's toponym has been officially adopted by the United States Board on Geographic Names.[1] The mountain has also been called "Mount Edgar" in publications going back as early as 1891,[6][7] and on maps of 1887.[8]

Climate

The peak is set within the Mojave Desert. According to the Köppen climate classification system, Edgar Peak has a cold desert climate, with the lower surrounding terrain in a hot desert climate zone. Temperatures average between 10 °F to 30 °F in January, and 50 °F to 100 °F in July.[9] Typical of high deserts, summer temperatures can be exceedingly hot, while winter temperatures can be cold. Winter snowfall melts rapidly in the arid and sunny climate.

Geology

Edgar Peak is composed of multiple rock formations. The top is composed of Jurassic Fountain Peak Rhyolite with a mean age of 164 Ma. The rhyolite cuts across and intrudes adjacent sedimentary units and is interpreted to represent the feeder system of an extrusive dome.[3] The sedimentary units consist of limestone and sandstone members of the Triassic Moenkopi Formation, and the Permian Bird Spring Formation which is predominantly limestone.

  • West aspect of Edgar Peak (center), viewed from Kelso Dunes
    West aspect of Edgar Peak (center), viewed from Kelso Dunes
  • Edgar Peak centered
    Edgar Peak centered
  • Edgar Peak (upper left, in back), Fountain Peak to right
    Edgar Peak (upper left, in back), Fountain Peak to right

References

  1. ^ a b c U.S. Geological Survey Geographic Names Information System: Edgar Peak
  2. ^ a b c d "Edgar Peak - 7,162' CA". listsofjohn.com. Retrieved 2024-09-30.
  3. ^ a b c Geologic Map of the Providence Mountains in Parts of the Fountain Peak and Adjacent 7.5′ Quadrangles, San Bernardino County, California, Paul Stone, U.S. Geological Survey, 2017.
  4. ^ "Edgar Peak, Peakvisor.com". Retrieved 2024-09-30.
  5. ^ David Harris, Afoot & Afield: Inland Empire, Wilderness Press, 2018, ISBN 9780899978161
  6. ^ Appendix to the Journals of the State and Assembly of the Twenty-Ninth Session of the Legislature of the State of California, Vol. V, 1891, p. 519.
  7. ^ Biennial Report, California State Board of Horticulture, 1892, p. 203.
  8. ^ Cram's Universal Atlas, George Franklin Cram, 1887, p. 67.
  9. ^ Peel, M. C.; Finlayson, B. L. & McMahon, T. A. (2007). "Updated world map of the Köppen−Geiger climate classification". Hydrology and Earth System Sciences. 11 (5): 1633–1644. Bibcode:2007HESS...11.1633P. doi:10.5194/hess-11-1633-2007. ISSN 1027-5606. S2CID 9654551.
Quelle: http://en.wikipedia.org/wiki/Edgar_Peak