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Maps showing selected geology and phosphate resources of the Stewart Flat quadrangle, Caribou County, Idaho

This report summarizes information on the thickness, grade, lateral continuity, phosphate resources, and ownership of phosplate-bearing units in the Meade Peak Phosphatic Shale Member of the Phosphoria Formation in the Stewart Flat quadrangle. This report is one of a series of quadrangle reports prepared by the Idaho Bureau of Mines and Geology under U.S. Geological Survey cost sharing contract #

Measured sections and discussion of the main turbidite member, Middle Pennsylvanian Minturn Formation, northern Sangre de Cristo Range, Custer and Saguache counties, Colorado

Turbidites are sediments deposited by turbid density currents. The turbidites described here are interpreted as prodelta deposits that formed in front of fan deltas and alluvial fans during the uplift of the ancestral Rocky Mountains in Pennsylvanian time. Laterally extensive, lenticular sand bodies deposited by turbidity flows crop out in the Middle Pennsylvanian Minturn Formation in the northern