Partly silicified dolomites, natural size, note the seams of dark gray quartz through the dolomite. Pend Oreille mine. Pend Oreille County, Washington. 1936. Plate 24-B, U.S.Geological Survey Professional paper 202. 1943.
Summary
Partly silicified dolomites, natural size, note the seams of dark gray quartz through the dolomite. Pend Oreille mine. Pend Oreille County, Washington. 1936. Plate 24-B, U.S.Geological Survey Professional paper 202. 1943.
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