Nugget Sandstone of Jurassic(?) and Triassic(?) age. Lincoln County, Wyoming. n.d.
Summary
Nugget Sandstone of Jurassic(?) and Triassic(?) age, showing chalcopyrite (cp) associated with bituminous material (B). Ore minerals may follow a fossil oil-water contact. Exposures by reflected light and by light transmitted through crossed polars; sample CU-28D. Lincoln County, Wyoming. n.d. Published as figure 7 in the U.S. Geological Survey Professional Paper 907-C. 1976.
Summary
Nugget Sandstone of Jurassic(?) and Triassic(?) age, showing chalcopyrite (cp) associated with bituminous material (B). Ore minerals may follow a fossil oil-water contact. Exposures by reflected light and by light transmitted through crossed polars; sample CU-28D. Lincoln County, Wyoming. n.d. Published as figure 7 in the U.S. Geological Survey Professional Paper 907-C. 1976.
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