Idaho Springs formation on east side of Grays Peak. Clear Creek County, Colorado. 1930.
Dates
Date Taken
1930
Summary
Idaho Springs formation on east side of Grays Peak; shows sill like seams of aplite and pegmatite parallel to the nearly horizontal schistosity and cross-breaking branch seams. Clear Creek County, Colorado 1930. Plate 6-A, U.S. Geological Survey, Professional paper 178. 1935. Figure 7-B, U.S. Geological Survey, Professional paper 223, 1950.
Summary
Idaho Springs formation on east side of Grays Peak; shows sill like seams of aplite and pegmatite parallel to the nearly horizontal schistosity and cross-breaking branch seams. Clear Creek County, Colorado 1930. Plate 6-A, U.S. Geological Survey, Professional paper 178. 1935. Figure 7-B, U.S. Geological Survey, Professional paper 223, 1950.
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
