AWi-19 Tuscahoma (Paleocene of the United States)

Where: Wilcox County, Alabama (31.9° N, 88.0° W)

• Paleocoordinates: 36.0° N, 60.8° W (Wright 2013)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Bells Landing Marl Member (Tuscahoma Formation), Thanetian (59.2 - 56.0 Ma)

• The fossiliferous bed is about 7 feet thick and contains lare Ostrea sinuosa and Venericardia aposmithii in the upper preserved mollusks in irregular layers near the center and in the lower part of the bed. Large spheroidal concretions have formed in the bed.

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; unlithified, glauconitic, gray, green, calcareous sandstone

• Sand, greenish gray, weathers yellowish gray, massive very fine grained, glauconitic, calcareous, fossiliferous.

Size class: mesofossils

Primary reference: L. D. Toulmin. 1977. Stratigraphic Distribution of Paleocene and Eocene Fossils in the Eastern Gulf Coast Region. Geological Survey of Alabama, Monograph 13(1):1-602 [M. Patzkowsky/K. Layou/P. Mannion]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 80762: authorized by Arnold Miller, entered by Jocelyn Sessa on 06.05.2008

Creative Commons license: CC0 (CC0)

Taxonomic list

Bivalvia
 Arcida - Glycymerididae
Glycymeris idonea Conrad 1865 clam
Glycymeris idonea subsp.
 Ostreida - Ostreidae
 Carditida - Carditidae
 Carditida - Crassatellidae
Crassatella tumidula Whitfield 1865 clam
 Cardiida - Veneridae
Pitar nuttalliopsis venus clam
2 Pitar nuttalliopsis fulrus, 6 Pitar nuttalliopsis greggi
Gastropoda
 Cerithioidea - Turritellidae
"Turritella mortoni" = Kapalmerella mortoni Conrad 1830 turret shell
Turritella mortoni postmortoni
Mesalia alabamiensis De Gregorio 1890 turret shell
Mesalia alabamiensis tetradeiras
 Neogastropoda - Volutidae
 Sorbeoconcha - Rostellariidae