P-12 (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: Biscutum romeini zone, Danian (66.0 - 61.6 Ma)

• composite section from CM-4 and Brazos-1, in foram zone P1a

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

• homogenized (from bioturbation) silty claystone with sparse fossils

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 5581: authorized by Arnold Miller, entered by Karen Layou on 18.10.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Nuculanida - Nuculanidae
Nuculana sp. Link 1807 pointed nut clam
N. sp. b
 Ostreida - Ostreidae
Ostreidae indet. Rafinesque 1815 oyster
 Arcida - Parallelodontidae
Nemodon eufaulensis clam
[entered as Nemodon eufalensis]
 Carditida - Carditidae
 Cardiida - Cardiidae
Cardiidae indet. Lamarck 1809 cockle
 Pholadida - Corbulidae
"Corbula subengonata" = Cuneocorbula subengonata
"Corbula subengonata" = Cuneocorbula subengonata Dall 1898 clam
Gastropoda
 Heterostropha - Ringiculidae
Ringiculidae indet. Philippi 1853 snail
 Sorbeoconcha - Procerithiidae
Nudivagus sp. snail
N. sp. a (7), N. sp. b (1)
 Neogastropoda -
Neogastropoda indet. Thiele 1929 snail
N. a (1), N. b (1), N. g (1)
 Neogastropoda - Turridae
Turridae indet. Swainson 1840 turrid
T. c
Amuletum sp. Stephenson 1941 turrid
A. sp. d
 Neogastropoda - Fasciolariidae
Anomalofusus sp. Wade 1916 snail
A. substriata or subnodosus
 Sorbeoconcha - Naticidae
Naticidae indet. Guilding 1834 moon snail
 Cerithioidea - Turritellidae
Pisces
  -
"Pisces indet." = Osteichthyes
"Pisces indet." = Osteichthyes Huxley 1880 bony fish
fish parts