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Altered Volcanic Ash Partings In The C Coal Bed, Ferron Sandstone Member Of The Mancos Shale, Emery County, Utah, United States Geological Survey
Altered Volcanic Ash Partings In The C Coal Bed, Ferron Sandstone Member Of The Mancos Shale, Emery County, Utah, United States Geological Survey
All U.S. Government Documents (Utah Regional Depository)
When volcanic ash falls onto the surface of a peat-forming swamp and is then covered by peat, it forms a horlzontal parting that can be recognized in the subsequent coal bed. As a consequence of the acid leaching environment in the swamp, the original glassy component and some of the less resistant pyrogenic minerals in the ash alter to clay minerals, usually kaolinite.
Geologic Map And Coal Sections Of The Red Point Quadrangle, Emery County, Utah, United States Geological Survey
Geologic Map And Coal Sections Of The Red Point Quadrangle, Emery County, Utah, United States Geological Survey
All U.S. Government Documents (Utah Regional Depository)
Red Point quadrangle, in Emery County in central Utah, was mapped in 1979 as part of the U.S. Geological Survey's program to evaluate land in the public domain for potential coal leasing.
Geologic Map And Coal Sections Of The Red Point Quadrangle, Eugene G. Elllis, U.S. Forest Service, U.S. Geological Survey, Joseph R. Frank
Geologic Map And Coal Sections Of The Red Point Quadrangle, Eugene G. Elllis, U.S. Forest Service, U.S. Geological Survey, Joseph R. Frank
All U.S. Government Documents (Utah Regional Depository)
Red Point quadrangle, in Emery County in central Utah, was mapped in 1979 as a part of the U.S. Geological Survey's progress to evaluate lands in the public domain for potential coal leasing. Mapping was done using U.S. Forest Service color aerial photographs at a scale of 1:15,640 and U.S. Geological Survey black-and-white aerial photographs at a scale of 1:30,000. The quadrangle was mapped previously by Spicker (1931) at a scale of 1:62,500.