P-1 (Brazos River K-T boundary, TX) (Paleocene of the United States)

Where: Falls County, Texas (31.3° N, 97.0° W: paleocoordinates 36.1° N, 77.4° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: T. imperforata zone, Danian (66.0 - 61.6 Ma)

• Composite section from CM-4 and Brazos-1, in foram zone P0

Environment/lithology: marine; unlithified, bioturbated, silty claystone

• homogenized (from bioturbation) silty claystone with sparse fossils (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 5570: authorized by Arnold Miller, entered by Karen Layou on 18.10.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Pisces
  -
"Pisces indet." = Osteichthyes
"Pisces indet." = Osteichthyes Huxley 1880 bony fish
fish parts
Cephalopoda
 Ammonoidea -
Ammonoidea indet. ammonite
fragments
Scaphopoda
 Gadilida - Gadilidae
Cadulus sp. Philippi 1844 tusk shell
Gastropoda
 Heterostropha - Ringiculidae
Ringiculidae indet. Philippi 1853 snail
 Cerithioidea - Litiopidae
Litiopa sp. Rang 1829 snail
L. sp. a
 Neogastropoda -
Neogastropoda indet. Thiele 1929 snail
N. sp. b
 Neogastropoda - Turridae
Turridae indet. Swainson 1840 turrid
T. sp. c
Bivalvia
 Nuculanida - Nuculanidae
Nuculana sp. Link 1807 pointed nut clam
Nuculana sp. b
 Nuculida - Nuculidae
Nucula ? sp. Lamarck 1799 nut clam
 Pectinida - Entoliidae
Syncyclonema sp. n. sp. Meek 1864 scallop
 Ostreida - Ostreidae
Ostreidae indet. Rafinesque 1815 oyster
 Arcida - Arcidae
 Cardiida - Cardiidae
Granocardium ? sp. Gabb 1869 cockle
 Carditida - Carditidae