State | Mississippi |
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Name | Prairie Bluff chalk and Owl Creek formation |
Geologic age | Upper Cretaceous |
Lithologic constituents | Major
Sedimentary > Carbonate > Limestone > ChalkPrairie Bluff chalk, compact brittle chalk, sandy chalk, and calcareous clay; at base contains many phosphatic molds of fossils; in Ponotoc and Union Counties merges northward into Owl Creek formation, tough blue glauconitic sandy clay.
Unconsolidated > Fine-detrital > ClayPrairie Bluff chalk, compact brittle chalk, sandy chalk, and calcareous clay; at base contains many phosphatic molds of fossils; in Ponotoc and Union Counties merges northward into Owl Creek formation, tough blue glauconitic sandy clay.
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Stratigraphic units | Selma Group |
References | Moore, William Halsell, 1969, reprinted 1985, Geologic Map of Mississippi, Compiled by Bicker, A. R., Jr., a revision of the geologic map published by the MS Geological Survey in 1945 in cooperation with the USGS, revised from data submitted by Dr. E. E. Russell of MS State University from published reports of the MS Geological Survey and from field revisions, Mercury Maps Inc., Jackson, MS., scale 1:500,000.Wingard, G.L., 1993, A detailed taxonomy of Upper Cretaceous and lower Tertiary Crassatellidae in eastern North America; an example of the nature of extinction: U.S. Geological Survey Professional Paper, 1535, 131 p.https://pubs.er.usgs.gov/publication/pp1535 |
NGMDB product | |
Counties | Chickasaw - Clay - Kemper - Noxubee - Oktibbeha - Pontotoc - Tippah - Union |