Muscovite-rich zones in pegmatite, G.D. Willes Feldspar quarry. Topsham Sagadahoc County, Maine. 1906.
Dates
Date Taken
1906
Summary
Muscovite-rich zones in pegmatite, G.D. Willes Feldspar quarry, Topsham Sagadahoc County, Maine. 1906. Plate 9-A in U.S. Geological Survey. Bulletin 445. 1911.
Summary
Muscovite-rich zones in pegmatite, G.D. Willes Feldspar quarry, Topsham Sagadahoc County, Maine. 1906. Plate 9-A in U.S. Geological Survey. Bulletin 445. 1911.
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