USGS 12931 (Cretaceous of the United States)

Also known as From weathered sandstone on the northward-facing slope of Sulphur Creek valley, in the northwestern corner of Franklin County.

Where: Franklin County, Texas (33.2° N, 95.2° W: paleocoordinates 38.2° N, 72.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Nacatoch Sand Formation, Maastrichtian (72.1 - 66.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; sandstone

• weathered sandstone

Size class: mesofossils

Reposited in the USGS

• Julia Gardner 1924

Primary reference: L. W. Stephenson. 1941. The larger invertebrate fossils of the Navarro group of Texas. The University of Texas Publication 4101:1-625 [M. Kosnik/M. Kosnik]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 7524: authorized by Matt Kosnik, entered by Matt Kosnik on 18.07.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Arcida - Cucullaeidae
Cucullaea powersi
Cucullaea powersi clam
Idonearca powersi Stephenson
 Arcida - Glycymerididae
Glycymeris sp.
Glycymeris sp. Da Costa 1778 clam
Glycymeris sp.
 Lucinida - Lucinidae
Lucina sp.
Lucina sp. Bruguière 1797 clam
Lucina spp.
 Poromyida - Poromyidae
Liopistha protexta
Liopistha protexta Conrad 1853 clam
Liopistha protexta (Conrad)
 Cardiida - Cardiidae
Granocardium (Granocardium) bowenae
Granocardium (Granocardium) bowenae cockle
Cardium (Granocardium) bowenae Stephenson
 Cardiida - Veneridae
Aphrodina tippana
Aphrodina tippana venus clam
Aphrodina tippana Conrad
 Trigoniida - Megatrigonioidae
Pterotrigonia eufaulensis gabbi
Pterotrigonia eufaulensis gabbi van Hoepen 1929 clam
Trigonia eufaulensis gabbi Stephenson
Gastropoda
 Seguenzioidea - Eucyclidae
? Calliomphalus sp.
? Calliomphalus sp. Cossmann 1888 snail
Calliomphalus? sp.
 Cerithioidea - Turritellidae
Turritella winchelli
Turritella winchelli turret shell
Turritella winchelli Shumard