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Mesozoic Geology of the Ritter Region Sierra Nevada, California

Homer D. Erwin
The Journal of Geology
Vol. 45, No. 4 (May - Jun., 1937), pp. 391-413
Stable URL: http://www.jstor.org/stable/30058863
Page Count: 23
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Mesozoic Geology of the Ritter Region Sierra Nevada, California
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Abstract

The Ritter region lies near the crest of the Sierra Nevada, southeast of Yosemite National Park, California. It is composed of an "attached roof remnant" which consists largely of metamorphosed pyroclastic rocks that have been invaded by small forerunners of the Sierra Nevada pluton. The composition and structural relations of the various rock masses are discussed. It is concluded that space for the intrusions was created largely by forceful displacement of the meta-volcanics. Two directions of regional discordance are noted, and their possible importance to the problem of intrusion is suggested.

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