Lava Mountains
Template:Short description Template:Infobox mountain The Lava Mountains are a mountain range located along the northern edge of the Mojave Desert, in San Bernardino County, California.[1][2] They are one of the eastern limits of the Fremont Valley.Script error: No such module "Unsubst". They span the northwestern portion of the Golden Valley Wilderness, which sits between it and the Almond Mountains on the southeastern side.[3] The mountain range is cut by several deep-walled canyons with distinctive layers of multicolored sedimentary rocks.[3] The peak of the mountain range is at around 5,000 feet on Dome Mountain.[3]
Geology
The mountains are located along the Garlock Fault.[4] The Blackwater fault passes through the southwestern part of the area, and the Brown's Ranch fault zone and its associated faults pass through the western part.[2]
The pre-Tertiary rocks in the area mainly consist of quartz monzonite.[2] The major sedimentary unit is the Bedrock Spring Formation, which is chiefly composed of arkosic sandstone and conglomerate, as well as some silstone and brecciated volcanic rocks.[2] That formation is overlain by the Almond Mountain volcanics and the Klinker Mountain volcanics in the eastern and western parts of the region, respectively.[2] Overlying these are flows of Lava Mountains andesite dating to the late Pliocene, which are finally covered by Quaternary gravels, alluvium, and travertine.[2] All of the volcanic rocks in the area are plagioclase andesite porphyries.[2]
References
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