Photomicrograph of polished section. Cellular marcasite coating fractured pyrite grains. X 60, Michigan-Snowbank mine. Summit County, Colorado. Circa 1963. Published in US Geological Survey Professional Paper 652, figure 18-C. 1971.
Summary
Photomicrograph of polished section. Cellular marcasite coating fractured pyrite grains. X 60, Michigan-Snowbank mine. Summit County, Colorado. Circa 1963. Published in US Geological Survey Professional Paper 652, figure 18-C. 1971.
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