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Mineral resource potential of the Piedra Wilderness Study Area, Archuleta and Hinsdale counties, Colorado
Alfred L. Bush, Steven M. Condon, Karen J. Franczyk, S. Don Brown
1983, Miscellaneous Field Studies Map 1630-A
The mineral resource potential of the Piedra Wilderness Study Area is low. No occurrences of metallic minerals, of valuable industrial rocks and minerals, or of useful concentrations of organic fuels are known in the study area. However, a noneconomic occurrence of gypsum in the Jurassic Wanakah Formation lies a few hundred feet west...