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Geologic Atlas of California - San Diego-El Centro Sheet



Geologic Atlas of California - San Diego-El Centro Sheet


California Geological Survey, Geologic Atlas of California Map No. 015, 1:250,000 scale

Compilation by: Rudolph G. Strand

1962

DESCRIPTION OF MAP UNITS

Dune sand
Alluvium
Lake deposits
River terrace deposits
Pleistocene marine and marine terrace deposits
Pleistocene volcanic rocks
Qpvr-rhyolite
Qpva-andesite
Qpvb-basalt
Qpvp-pyroclastic rocks
Pleistocene nonmarine
Plio-Pleistocene nonmarine
Undivided Pliocene nonmarine
Upper Pliocene marine
Middle and/or lower Pliocene marine
Undivided Miocene nonmarine
Upper Miocene nonmarine
Upper Miocene marine
Miocene volcanic rocks
Mvr-rhyolite
Mva-andesite
Mvb-basalt
Mvp-pyroclastic rocks 
Eocene nonmarine
Eocene marine
Tertiary intrusive (hypabyssal) rocks
Tir-rhyolite
Tia-andesite
Tib-basalt
Tertiary lake deposits
Tertiary volcanic rocks
Tvr-rhyolite
Tva-andesite
Tvb-basalt
Tvp-pyroclastic rocks
Upper Cretaceous marine
Upper Jurasssic marine
Mesozoic granitic rocks 
Mesozoic basic intrusive rocks
Jurassic-Triassic metavolcanic rocks
Pre-Cretaceous metamorphic rocks (ls=limestone)
Pre-Cretaceous metasedimentary rocks
Pre-Cenozoic granitic and metamorphic rocks

Click here for the Index to Geologic Mapping in California.

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