USGS 25511 (Cretaceous of the United States)

Also known as Roadcuts on Mississippi Route 30, on N-facing slope of Wilhite Creek valley from 0.7 to 1.7 miles S of Keownville, Union Co., Miss.

Where: Union County, Mississippi (34.5° N, 89.0° W: paleocoordinates 38.2° N, 65.8° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Keownville Member (Ripley Formation), Maastrichtian (72.1 - 66.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; yellow, silty, sandy limestone

• Limestone, yellow-brown, sandy, silty, micaceous, sideritic, fossiliferous

Size class: mesofossils

Reposited in the USGS

• ? L.W. Stephenson and N.F. Sohl 1955

Primary reference: N. F. Sohl. 1960. Archeogastropoda, Mesogastropoda and stratigraphy of the Ripley, Owl Creek, and Prairie Bluff Formations. US Geological Survey Professional Paper 331:1-151 [M. Kosnik/M. Kosnik]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 7608: authorized by Matt Kosnik, entered by Matt Kosnik on 18.07.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Hippuritida - Antillocaprinidae
cf. Titanosarcolites sp. Trechmann 1924 rudist
cf. Titanosarcolites sp.
 Arcida - Glycymerididae
Glycymeris rotundata clam
Glycymeris rotundata (Gabb)
 Arcida - Cucullaeidae
Cucullaea littlei Gabb 1877 clam
Idonearca littlei (Gabb)
 Ostreida - Gryphaeidae
"Exogyra costata" = Exogyra (Exogyra) costata
"Exogyra costata" = Exogyra (Exogyra) costata Say 1820 oyster
Exogyra costata Say