Spodumene_-_large_crystals_in_granite_-_Etta_mine,_Keystone,_Pennington_County,_South_Dakota.jpg

Summary

Description
Deutsch: Große Spodumen -Kristalle im Granitgang.
  • der Etta Mine bei Keystone, Pennington County, South Dakota, USA
English: Large crystals of Spodumene in granite dike.
  • Etta Mines, near Keystone — Black Hills , Pennington County, South Dakota. 1908.
  • Plate 7 in U.S.Geological Survey. Folio 219. 1925.
Date
Source http://libraryphoto.cr.usgs.gov/cgi-bin/show_picture.cgi?ID=ID.%20Paige,%20S.%201220
Author U.S.Geological Survey


Licensing

Public domain
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 .

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