CM-1-17 (Brazos River K-T boundary, TX) (Cretaceous of the United States)

Where: Falls County, Texas (31.3° N, 96.9° W: paleocoordinates 36.6° N, 75.4° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: P. quadripunctata nannofossil zone, Corsicana Marl Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• Discoscaphites iris ammonoid zone - Landman et al., 2004

Environment/lithology: marine; unlithified, shelly/skeletal, gray claystone

• fossiliferous clay (described as a massive gray claystone with evenly dispersed shells in hansen et al. 1987)

Size class: mesofossils

Collection methods: bulk, mechanical,

Primary reference: T. A. Hansen, B. Upshaw, E. G. Kauffman and W. Gose. 1993. Patterns of molluscan extinction and recovery across the Cretaceous-Tertiary boundary in east Texas; report on new outcrops. Cretaceous Research 14:685-706 [A. Miller/K. Layou/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 5569: authorized by Arnold Miller, entered by Karen Layou on 15.10.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Baculitidae
Baculites sp.
Baculites sp. Lamarck 1799 ammonite
Bivalvia
 Nuculanida - Nuculanidae
Nuculana sp.
Nuculana sp. Link 1807 pointed nut clam
 Pholadida - Corbulidae
Corbula sp., Corbula ? williardi
Corbula sp. Bruguière 1789 clam
C. sp. a (1), C. sp. (2)
 Cardiida - Tellinidae
Tellina sp.
Tellina sp. Linnaeus 1758 tellin clam
 Pectinida - Anomiidae
Anomia argentaria
Anomia argentaria Morton 1833 jingle
 Ostreida - Ostreidae
Ostrea sp., "Ostrea mesenterica" = Lopha mesenterica, Ostrea aff. congesta
Ostrea sp. Linnaeus 1758 oyster
"Ostrea mesenterica" = Lopha mesenterica Morton 1834 oyster
Ostrea aff. congesta Conrad 1843 oyster