Skip to main content
USGS - science for a changing world

Alteration (silicification) typical of early White porphyry; note extensive development of coarse secondary grainlets of quartz, with inclusions and absence of true phenocrysts. Lake County, Colorado. 1935.

Dates

Date Taken
1935

Summary

Alteration (silicification) typical of early White porphyry; note extensive development of coarse secondary grainlets of quartz, with inclusions and absence of true phenocrysts. X 33; crossed nicols; from Great Eastern shaft, near Lake Isabelle. Lake County, Colorado. 1935. Figure 28, in U.S.Geological Survey Professional paper 235. 1953.

Contacts

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

Attached Files

Click on title to download individual files attached to this item.

bch00068.jpg thumbnail 14.67 MB

Rights

This USGS product is considered to be in the U.S. public domain. For further information on the USGS Information Policies and Instructions, refer to the Copyrights and Credits section on this web page: http://www.usgs.gov/laws/info_policies.html
Preview Image

Tags

Categories
label
category
collection

Provenance

Additional Information

Identifiers

Type Scheme Key
name photoLibrary bch00068
number photoLibrary 3898
batch photoLibrary btch301
number_in_book photoLibrary 68

Item Actions

View Item as ...

Save Item as ...

View Item...