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Photomicrograph of Boulder Creek granite from east of junction of Middle Boulder and North Boulder Creek. Boulder County, Colorado. circa 1932.

Dates

Date Taken
1932

Summary

Album caption and index card: Photomicrograph of Boulder Creek granite from ridge half a mile east of junction of Middle Boulder and North Boulder Creeks. Primary gneissic structure indicated by quartz- oligoclase contact and by biotite is nearly horizontal in photograph. Slight secondary shearing shown by undulatory extinction of quartz in upper right. b, biotite; o, oligoclase; q, quartz. Polarized light. Boulder County, Colorado. Notes: Published as figure X-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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lts00696.jpg thumbnail 3.77 MB image/jpeg

Material Request Instructions

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

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Identifiers

Type Scheme Key
name photoLibrary lts00696
number photoLibrary 22487
batch photoLibrary btch297
number_in_book photoLibrary 696

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