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Photomicrograph of rhyolite porphyry. Boulder County, Colorado. circa 1932.

Dates

Date Taken
1932

Summary

Album caption and index card: Photomicrograph of rhyolite porphyry of group 7 from dike 1 mile north of Argentine Pass. The phenocrysts have borders of fine-grained oriented quartz in the groundmass. o, sericitized orthoclase; q, quartz. Crossed nicols. Boulder County, Colorado. Notes: Published as figure XIII-C in U.S.Geological Survey. Professional Paper 223. 1950.

Contacts

Data Owner :
U.S. Geological Survey
Photographer :
Lovering, Thomas Seward

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Available in the U.S. Geological Survey Denver Library Photographic Collection, Lovering, T.S.
 
 

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Identifiers

Type Scheme Key
name photoLibrary lts00705
number photoLibrary 22496
batch photoLibrary btch297
number_in_book photoLibrary 705

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