Bed D, Stone City Bluff (Eocene of the United States)

Where: Brazos County, Texas (30.6° N, 96.5° W: paleocoordinates 31.9° N, 87.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Stone City Formation, Bartonian (41.3 - 38.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; unlithified, fine, glauconitic, shelly/skeletal, brown, gray sandstone and poorly lithified, glauconitic marl

• olive-grey weathering to light brown, poorly bedded, richly fossiliferous, marly, fine to very-fine grained glauconite arenite and marl; contains small pockets of loose, grayish-orange, fossiliferous, very fine-grained sand and a hard, dense, pale yellowish-brown, irregular, fossiliferous, glauconitic, silty, calcareous concretion layer about 0.1 to 0.2 foot thick

Size class: macrofossils

Primary reference: H. B. Stenzel. 1935. Nautiloids of the genus Aturia from the Eocene of Texas and Alabama. Journal of Paleontology 9:551-562 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 41427: authorized by Arnold Miller, entered by Karen Layou on 14.07.2004, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Arcidae
Pachecoa (Pachecoa) sabinica Harris 1919 clam
abundant
Barbatia (Barbatia) uxorispalmeri Stenzel and E. K 1957 clam
rare
 Pectinida - Anomiidae
Anomia ephippioides Gabb 1860 jingle
rare
 Carditida - Carditidae
"Venericardia (Venericor) planicosta" = Venericor planicosta
"Venericardia (Venericor) planicosta" = Venericor planicosta Lamarck 1801 clam
rare; Venericardia (Venericor) planicosta densata
 Pholadida - Corbulidae
Vokesula smithvillensis Harris 1919 clam
common; V. smithvillensis petropolitana
 Cardiida - Veneridae
Katherinella smithvillensis Stenzel et al. 1957 venus clam
rare
 Cardiida - Tellinidae
Tellina (Eurytellina) mooreana Gabb 1860 tellin clam
rare
 Nuculida - Nuculidae
Nucula (Nucula) mauricensis Harris 1919 nut clam
frequent
 Protobranchia - Nuculanidae
Orthoyoldia psammotaea Dall 1898 pointed nut clam
common
Calorhadia (Calorhadia) compsa pointed nut clam
common
"Calorhadia (Litorhadia) petropolitana" = Litorhadia pointed nut clam
common
Calorhadia (? Litorhadia) evanescentior Stenzel and E. K 1957 pointed nut clam
rare
Cephalopoda
 Nautilida - Aturiidae
"Aturia (Brazaturia) brazoensis" = Aturia brazoensis
"Aturia (Brazaturia) brazoensis" = Aturia brazoensis Stenzel 1935 nautiloid