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Gateway to the Paleobiology Database
MGS #116 (Oligocene of the United States)

Where: Warren County, Mississippi (32.3° N, 90.9° W: paleocoordinates 32.7° N, 84.3° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Byram Formation, Rupelian (33.9 - 28.4 Ma)

• The Byram Formation is in the middle of a regressive sequence.

• formation-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; unlithified, argillaceous sandstone

• fossiliferous, clayey sands

Size class: mesofossils

Preservation: original aragonite, original calcite

Collection methods: bulk, mechanical,

• bivalves only**abundances are given as counts ONLY for those species with fewer than 100 specimens - for 100 or more, he just gives "A" for "abundant". In the case where a collection includes an "A", we enter abundance classes for species instead of counts as follows: Fewer than 10 specimens = R (rare)10 to 99 specimens = C (common)Greater than 99 specimens(Dockery's "A") = A (abundant)In this reference, "specimens" equals "valves"

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: biostratigraphic analysis

PaleoDB collection 7110: authorized by Linda Ivany, entered by Elizabeth Kowalski on 26.04.2000

Creative Commons license: CC BY (attribution)