Where: Wayne County, Mississippi (31.7° N, 88.7° W: paleocoordinates 31.9° N, 82.2° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Red Bluff Formation, Rupelian (33.9 - 28.1 Ma)
• Red Bluff formation is exposed in Clark and Wayne counties, Mississippi. It consists of fossiliferous, dark grey, silty clay with zones of ironstone concentrations in lower part.These sediments conformably overlie the blue-grey, 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. Lower part of the Red Bluff Formation is the most fossiliferous. Otoliths are also abundant here.
• formation-level stratigraphic resolution
Environment/lithology: offshore; poorly lithified, gray, silty claystone 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/M. Uhen]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 5779: authorized by Linda Ivany, entered by Sarah DeLong on 30.11.1999, edited by Laurie Eccles
Creative Commons license: CC BY (attribution)
Taxonomic list
•Since taxa with greater than 99 specimens were not counted with absolute abundances, these were reported with category "A" for abundant.
Bivalvia | |
Yoldia clydoniona n. sp.
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Chama pappiladerma n. sp.
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"Ventricolaria ucuttana" = Globivenus, Pitar aldrichi n. sp.
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Corbula rufaripa n. sp., Corbula engonata
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"Venericardia carsonensis" = Venericardia (Rotundicardia) carsonensis
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"Spondylus dumosus" = Spondylus dumosus, "Spondylus (Spondylus) dumosus" = Spondylus dumosus1, Chlamys cocoana, "Pecten perplanus" = Pecten (Pecten) perplanus
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Scaphopoda | |
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Gastropoda | |
Turritella rubricollis n. sp.2
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"Tritiaria macilenta" = Nassarius (Tritiaria)2
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Odostomia vicksburgella n. sp.2
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Anthozoa | |
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