GEOLOGY - Foundation of the present; key to California's future.
~EOLOGY September 1979
CALIFORNIA AND PLATE TECTONICS
Generalized Geologic Units
k<:<:J Quaternary sedimentary rocks
§§ Tertiary sedimentary rocks
~ Quaternary and Tertiary volcanic
~rocks of CASCADE RANGE and
- Cretaceous sedimentary rocks
fN~~JB&J ~r~suo;oic Franciscan- Knoxville
~Mesozoic- Paleozoic metamorphic
~and granitic rocks
~ Precambrian to Recent rock
complex of the BASIN- RANGE 6.
Geomorphic province boundary
Geologic unit boundary
25 50 100 MILES
California's present geomorphic provinces are the result of geologic processes which
have been active for millions of years. Some of these processes are sedimentation. vol canism.
plutonic intrusion. metamorphism. erosion. and tectonism . For a summary of
the geotectonic development of California. see the article on page 187.
Copyright by the California Department of Conservation California Geological Survey. All rights reserved. No part of this publication may be reproduced without written consent of the California Geological Survey.