Prairie Bluff chalk and Owl Creek formation (MSKp;0)

State	Mississippi
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.
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	NGMDB product page for 16555
Counties	Chickasaw - Clay - Kemper - Noxubee - Oktibbeha - Pontotoc - Tippah - Union

State

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.

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

NGMDB product page for 16555

Counties

Chickasaw - Clay - Kemper - Noxubee - Oktibbeha - Pontotoc - Tippah - Union