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Geologic Atlas of California - Alturas Sheet



Geologic Atlas of California - Alturas Sheet


California Geological Survey, Geologic Atlas of California Map No. 001, 1:250,000 scale

Compilation by: Thomas E. Gay. Jr. and Quintin A. Aune

1958

DESCRIPTION OF MAP UNITS

Dune sand
Alluvium
Recent volcanic rocks
Qrvr-rhyolite
Qrva-andesite
Qrvb-basalt
Qrvp-pyroclastic rocks
Lake deposits
Glacial deposits
River terrace deposits
Pleistocene volcanic rocks
Qpvr-rhyolite
Qpva-andesite
Qpvb-basalt
Qpvp-pyroclastic rocks
Pleistocene nonmarine
Quaternary and/or Pliocene cinder cones
Undivided Pliocene nonmarine
Upper Pliocene nonmarine
Pliocene volcanic rocks
Pvr-rhyolite
Pva-andesite
Pvb-basalt
Pvp-pyroclastic rocks
Undivided Miocene nonmarine
Miocene volcanic rocks
Mvr-rhyolite
Mva-andesite
Mvb-basalt
Mvp-pyroclastic rocks 
Oligocene nonmarine
Eocene nonmarine
Tertiary intrusive (hypabyssal) rocks
Tir-rhyolite
Tia-andesite
Tib-basalt
Tertiary volcanic rocks
Tvr-rhyolite
Tva-andesite
Tvb-basalt
Tvp-pyroclastic rocks
Middle and/or Lower Jurassic marine
Triassic marine
Jurassic-Triassic metavolcanic rocks

Click here for the Index to Geologic Mapping in California.

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