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Petrography and structural relations of granitic basement rocks in the Monterey Bay area, California

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Donald C. Ross, and Earl E. Brabb, 1973, Petrography and structural relations of granitic basement rocks in the Monterey Bay area, California: Journal of Research of the U.S. Geological Survey, v. 1, iss. 3.

Summary

In the past, the granitic basement of the Coast Ranges has been thought to be dominantly quartz diorite and low in K-feldspar. However, a study of outcrops around Monterey Bay, basement well samples, and dredge samples from Monterey Bay shows that the granitic basement averages about 15 to 20 percent K-feldspar. Therefore, as a sedimentary provenance, the basement around Monterey Bay could have contributed abundant K-feldspar to the Cenozoic sedimentary deposits of the region; that is, in the Monterey Bay area the local basement is an adequate source for the abundant K-feldspar in the sedimentary units. The distribution of basement rocks and mapped faults, coupled with gravity-geophysical data, suggests that the area between the [...]

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Type Scheme Key
local-index unknown 70160728
local-pk unknown 70160728
series unknown Journal of Research of the U.S. Geological Survey

Citation Extension

journalJournal of Research of the U.S. Geological Survey
parts
typevolume
value1
typeissue
value3
typePublication Place
valueReston, VA
languageEnglish
citationTypeArticle

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