Bed H, 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)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, concretionary, micaceous, brown, gray, yellow, silty, carbonaceous shale and poorly lithified, fine-grained, glauconitic, shelly/skeletal, gray sandstone

• firm to unctuous when wet or brittle when dry, brownish-gray or brownish-black weathering to dark yellowish-orange, laminated to very thin-bedded, muscovitic, lignitic, silty shale; contains irregular medium dark gray, very thin silt partings and small, very hard, round light olive gray, calcareous concretions enclosing a few thin shelled fossils; at 3.0 ft from the top a thin (0.1-0.2 ft) bed of crumbly, olive-gray or olive black, fossiliferous, fine-grained glauconite arenite

Size class: macrofossils

Preservation: concretion

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 41431: authorized by Arnold Miller, entered by Karen Layou on 14.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Cardiida - Veneridae
Katherinella smithvillensis Stenzel et al. 1957 venus clam
 Cardiida - Tellinidae
Tellina (Eurytellina) mooreana Gabb 1860 tellin clam
 Protobranchia - Nuculanidae
Orthoyoldia psammotaea, Calorhadia (Calorhadia) compsa, "Calorhadia (Litorhadia) petropolitana" = Litorhadia
Orthoyoldia psammotaea Dall 1898 pointed nut clam
Calorhadia (Calorhadia) compsa pointed nut clam
"Calorhadia (Litorhadia) petropolitana" = Litorhadia pointed nut clam