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Sacramento porphyry. Main phenocrysts are altered andesine-oligoclase; also present are hornblende and biotite. Lake County, Colorado. 1935.

Dates

Date Taken
1935

Summary

Sacramento porphyry. Main phenocrysts are altered andesine-oligoclase; also present are hornblende and biotite. X 40; plain transmitted light. Board of Trade Amphitheater. Lake County, Colorado. 1935. Figure 44, in U.S.Geological Survey Professional paper 235. 1953.

Contacts

Data Owner :
U.S. Geological Survey
Photographer :
Behre, Charles Henry

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Identifiers

Type Scheme Key
name photoLibrary bch00062
number photoLibrary 3892
batch photoLibrary btch301
number_in_book photoLibrary 62

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