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Diabase, Lost Creek, Granite County, Montana. Circa 1907.

Dates

Date Taken
1907

Summary

Diabase. Lost Creek sill. Shows intergrowth of quartz with hornblende and with plagioclase. The plagioclase in the intergrowth has the same orientation as the adjacent large crystal. The quartz areas marked "Q" have all the same orientation. Those marked "Q2" have another uniform orientation. Crossed nichols. SP. 8 C 67. x 60. Granite County, Montana. Circa 1907. Published in U.S. Geological Survey Professional Paper 78, Plate XII-A. 1913.

Contacts

Data Owner :
U.S. Geological Survey
Photographer :
Calkins, Frank Cathcart

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Identifiers

Type Scheme Key
name photoLibrary cfc00145
number photoLibrary 6049
batch photoLibrary btch251
number_in_book photoLibrary 145

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