CM-1-12 (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 evely 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 5564: 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
unclassified
  -
Pterot aff. castrovillensis
Pterot aff. castrovillensis
Pterot rigonia aff. castrovillensis
Pisces
  -
"Pisces indet." = Osteichthyes
"Pisces indet." = Osteichthyes Huxley 1880 bony fish
fish scale, bone
Bivalvia
 Nuculanida - Nuculanidae
Nuculana houstoni, Nuculana sp.
Nuculana houstoni pointed nut clam
Nuculana sp. Link 1807 pointed nut clam
N. sp. c (1), N. sp. (3)
 Ostreida - Ostreidae
Ostrea sp.
Ostrea sp. Linnaeus 1758 oyster
 Ostreida - Flemingostreidae
Cubitostrea tecticosta
Cubitostrea tecticosta Gabb 1860 oyster
 Arcida - Parallelodontidae
Nemodon sp.
Nemodon sp. Conrad 1869 clam
N. sp. a
 Arcida - Arcidae
Striarca webbervillensis
 Pholadida - Corbulidae
Corbula sp.
Corbula sp. Bruguière 1789 clam
 Lucinida - Lucinidae
Lucina aff. chatfieldana