This article is about Shadow Mountains (western San Bernardino County). For Shadow Mountains in eastern San Bernardino County, see Shadow Mountains.

The Shadow Mountains are a mountain range in western San Bernardino County, California, United States.[1] The southeastern edge of the range is 4 miles northwest of Adelanto and 6 miles west of the Mojave River; the northern part of the range is 14 miles north northwest of Adelanto. Although they provide a name for and are prominent in the Shadow Mountains quadrangle map, they are not labelled on it.[2] They are mentioned on USGS 7.5 topographic map Victorville NW.[3]

The highest peak, at 4120 feet above sea level, is Shadow Mountain; there is a radio tower on top of it.[4] Silver Peak, 1.37 miles to the east, is 4041 feet. Both peaks give good views of the desert and Edwards Air Force base.[5] Part of the mountains in the south are in the El Mirage Off-Highway Vehicle area, administered by the Bureau of Land Management.

Geology

The mountains are composed of Pre-Cretaceous metasedimentary rocks in the northeast and southeast; granite and adamellite in the center. There is some undivided Carboniferous marine rocks in the extreme southeast part of the mountains, and Pleistocene nonmarine in the extreme north.[6] Mineral resources include fluorite[7] and tungsten.[8]

Flora

Plants include Krascheninnikovia lanata (winter fat)[9] and Phacelia fremontii Fremont’s phacelia.[10]

References

  1. ^ a b "Shadow Mountains". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved 2024-09-24.
  2. ^ https://prd-tnm.s3.amazonaws.com/StagedProducts/Maps/USTopo/PDF/CA/CA_Shadow_Mountains_20150225_TM_geo.pdf
  3. ^ https://prd-tnm.s3.amazonaws.com/StagedProducts/Maps/USTopo/PDF/CA/CA_Victorville_NW_20150225_TM_geo.pdf
  4. ^ https://www.summitpost.org/shadow-mountains-mojave-desert/382515. The peak is not named on the USGS topo map.
  5. ^ "Shadow Mountains High Point - Peakbagger.com". peakbagger.com.
  6. ^ Geologic Map of California Olaf P. Jenkins edition, San Bernardino Sheet, compilation by Thomas H. Rogers, 1967. https://www.conservation.ca.gov/cgs/Documents/Publications/Geologic-Atlas-Maps/GAM_14-SanBernardino-1967-Map.pdf; see also https://www.geosociety.org/maps/1998-martin-shadowmt/1998-martin-shadowmt.pdf. https://quarriesandbeyond.org/states/ca/quarry_photo/ca-san_bernardino_photos.html reports limestone in the southeast.
  7. ^ "Shadow Mts [2], San Bernardino County, California, USA".
  8. ^ "Adelanto Tungsten Fields (Shadow Mountains Tungsten Fields; Adelanto), Shadow Mts [2], San Bernardino County, California, USA".
  9. ^ "Calflora Observation". calflora.org.
  10. ^ "Calflora Observation". calflora.org.


Allikas: http://en.wikipedia.org/wiki/Shadow_Mountains_(western_San_Bernardino_County)
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