Bed S(MGB), 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; poorly lithified, fine, concretionary, shelly/skeletal, gray, red, silty sandstone and unlithified marl

• resistant, olive-gray, weathering to grayish-red or very dusky red, massive to poorly bedded, richly fossiliferous, marly, silty, very fine-grained glauconite arenite and maril containing layers of rolled fossils, especially near the top; large hard, dark greenish-gray, irregular, argillaceous, sideritic, calcareous concretions are found loosely spaced in the middle and crowded hear the top to form a continuous clay-ironstone layer

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 41436: authorized by Arnold Miller, entered by Karen Layou on 14.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Nuculida - Nuculidae
Nucula (Nucula) mauricensis
Nucula (Nucula) mauricensis Harris 1919 nut clam
abundant
 Nuculanida - Nuculanidae
Calorhadia (Calorhadia) compsa, Orthoyoldia psammotaea, Calorhadia (? Litorhadia) evanescentior
Calorhadia (Calorhadia) compsa pointed nut clam
common
Orthoyoldia psammotaea Dall 1898 pointed nut clam
common
Calorhadia (? Litorhadia) evanescentior Stenzel and E. K 1957 pointed nut clam
rare
 Carditida - Carditidae
"Venericardia (Venericor) planicosta" = Venericor planicosta, Venericardia (Claibornicardia) trapaquara
"Venericardia (Venericor) planicosta" = Venericor planicosta Lamarck 1801 clam
abundant; V. (Venericor) planicosta densata
 Pholadida - Corbulidae
Notocorbula texana, Vokesula smithvillensis, Caryocorbula deusseni
Notocorbula texana Gabb 1860 clam
abundant
Vokesula smithvillensis Harris 1919 clam
abundant
Caryocorbula deusseni clam
common
 Cardiida - Veneridae
Katherinella smithvillensis, Pitar (Calpitaria) petropolitanus
Katherinella smithvillensis Stenzel et al. 1957 venus clam
rare
Pitar (Calpitaria) petropolitanus Stenzel et al. 1957 venus clam
common
 Cardiida - Anatinellidae
Pteropsella praelapidosa
Pteropsella praelapidosa clam
common; originally Kymatox praelapidosus, corrected genus from authors' addendum in text [entered as Pteropsella praelapidosus]
 Cardiida - Ungulinidae
Diplodonta (Diplodonta) petropolitana
 Cardiida - Semelidae
Abra (Abra) petropolitana
Abra (Abra) petropolitana Stenzel 1957 abra
rare
 Cardiida - Tellinidae
Tellina (Eurytellina) mooreana, Tellina (Moerella) petropolitana
Tellina (Eurytellina) mooreana Gabb 1860 tellin clam
common
Tellina (Moerella) petropolitana Stenzel and Krause 1957 tellin clam
rare
 Arcida - Arcidae
Barbatia (Barbatia) uxorispalmeri, Pachecoa (Pachecoa) pulchra, Pachecoa (Pachecoa) sabinica
Barbatia (Barbatia) uxorispalmeri Stenzel and E. K 1957 clam
abundant
Pachecoa (Pachecoa) sabinica Harris 1919 clam
abundant
 Ostreida - Ostreidae
Cubitostrea (Cubitostrea) petropolitana, Crassostrea frionis
Cubitostrea (Cubitostrea) petropolitana Stenzel and J. T 1957 oyster
abundant
Crassostrea frionis oyster
common
 Pectinida - Anomiidae
Anomia ephippioides
Anomia ephippioides Gabb 1860 jingle
abundant