Contact between Niobrara Formation (above) and Carlile Shale (below). Custer County, South Dakota. Circa 1967.
Dates
Date Taken
1967
Summary
Contact between Niobrara Formation (above) and Carlile Shale (below) at a locality about k miles south of Fairburn in the NW 1/4, SE 1/4, sec. 13, T. 5 S., R. 7 E. The phosphate nodules are in the bed at the head of the hammer. The matrix of the bed consists of pyrite, mostly oxidized to yield iron oxides and gypsum. Custer County, South Dakota. Circa 1967. Published as figure 3 in U. S. Geological Survey Professional Paper 594-L. 1968.
Summary
Contact between Niobrara Formation (above) and Carlile Shale (below) at a locality about k miles south of Fairburn in the NW 1/4, SE 1/4, sec. 13, T. 5 S., R. 7 E. The phosphate nodules are in the bed at the head of the hammer. The matrix of the bed consists of pyrite, mostly oxidized to yield iron oxides and gypsum. Custer County, South Dakota. Circa 1967.
Published as figure 3 in U. S. Geological Survey Professional Paper 594-L. 1968.
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