ammonites
banner
Gateway to the Paleobiology Database
MGS 38 (Oligocene of the United States)

Where: Wayne County, Mississippi (31.8° N, 88.7° W: paleocoordinates 32.1° N, 82.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• formation-level stratigraphic resolution

Environment/lithology: offshore; unlithified, glauconitic, gray, silty, sandy claystone and sandstone

• the red bluff formation as exposed in clark and wayne counties, mississippi, consists of fossiliferous, dark gray, silty clay with zones of ironstone concentrations in the lower part. these sediments disconformably overlie the blue - grey, blocky, marine clay of the shabuta clay, member of the yazoo formation and were deposited in shallow marine shelf, prodelta, and marginal delta bay enviroments. fossils occur in narrow glauconitic sand lenses within the clay.

Size class: mesofossils

Preservation: original aragonite, original calcite

Collection methods: surface (in situ), mechanical,

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 5612: authorized by Linda Ivany, entered by Sarah DeLong on 03.11.1999, edited by Laurie Eccles

Creative Commons license: CC BY (attribution)