Image: North Star sheeted veinlets

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Description: Polished slab of granodiorite showing sheeted zone of carbonate veinlets, North Star mine, No. 1 vein, 7,200-foot level. Nevada County, California. 1931. Plate 10-A, U.S.Geological Survey Professional paper 194. 1940.
Title: North Star sheeted veinlets
Credit: http://libraryphoto.cr.usgs.gov/cgi-bin/show_picture.cgi?ID=ID.%20Johnston,%20W.D.,%20Jr.%20%2092
Author: U.S.Geological Survey Professional paper 194. 1940.
Permission: This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

Image usage

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North Star Mine and Powerhouse

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