Bed X, Stone City Bluff (type locality Stone City beds) (Eocene to of the United States)

Where: Brazos County, Texas (30.6° N, 96.5° W: paleocoordinates 32.4° N, 86.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Stone City Formation, Lutetian to Lutetian (47.8 - 38.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; unlithified, lenticular, fine-grained, glauconitic, shelly/skeletal, brown, gray, calcareous sandstone and lithified marl

• hard, dark olive gray, when dray or olive-black to moderate yellowish-brown when wet, weathering to dark yellowish-orange and grayish-red and very dusky red, thickly lenticular, very fossiliferous, limonitic, calcareous, fine-grained glauconite arenite and marlstone

Size class: macrofossils

Primary reference: H. B. Stenzel, E. K. Krause, and J. T. Twining. 1957. Pelecypoda from the type locality of the Stone City beds (Middle Eocene) of Texas. University of Texas Publication (5704) [M. Kosnik/M. Kosnik/M. Kosnik]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 41443: authorized by Arnold Miller, entered by Karen Layou on 14.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Arcida - Arcidae
Pachecoa (Pachecoa) sabinica Harris 1919 clam
Barbatia (Barbatia) uxorispalmeri Stenzel and E. K 1957 clam
 Carditida - Carditidae
"Venericardia (Venericor) planicosta" = Venericor planicosta
"Venericardia (Venericor) planicosta" = Venericor planicosta Lamarck 1801 clam
abundant; V. (Venericor) planicosta densata
 Pholadida - Corbulidae
Notocorbula texana Gabb 1860 clam
Vokesula smithvillensis Harris 1919 clam
abundant; V. smithvillensis petropolitana
 Cardiida - Veneridae
Pitar (Calpitaria) petropolitanus Stenzel et al. 1957 venus clam
 Cardiida - Tellinidae
Tellina (Eurytellina) mooreana Gabb 1860 tellin clam
 Protobranchia - Nuculanidae
Orthoyoldia psammotaea Dall 1898 pointed nut clam