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Gateway to the Paleobiology Database
MGS #46 (Oligocene of the United States)

Where: Clarke County, Mississippi (31.8° N, 88.8° W: paleocoordinates 32.1° N, 82.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Red Bluff Formation, Rupelian (33.9 - 28.4 Ma)

• The Red Bluff Formation as exposed in Clarke and Wayne counties,Mississippi, consists of fossiliferous, dark gray, silty clay with zones of ironstone concretions in the lower part. These sediments disconformably overlie the blue-gray, blocky, marine clay of the Shubuta clay member of the yazoo Formation and were deposited in shallow marine shelf, prodelta, and marginal delta bay enviroments.

• formation-level stratigraphic resolution

Environment/lithology: offshore; gray, silty, sandy siltstone and ironstone

Size class: mesofossils

Preservation: original aragonite, original calcite

Collection methods: bulk, mechanical,

• Bivalves only

Primary reference: D. T. Dockery. 1982. Lower Oligocene Bivalvia of the Vicksburg Group in Mississippi. Mississippi Department of Natural Resources Bureau of Geology 123:1-261 [L. Ivany/S. DeLong] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 5788: authorized by Linda Ivany, entered by Sarah DeLong on 02.12.1999, edited by Laurie Eccles

Creative Commons license: CC BY (attribution)