CM-1-3 (Brazos River K-T boundary, TX): Late/Upper Maastrichtian, Texas

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Syncyclonema simplicius Conrad 1860
2 specimens
Scaphopoda - Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758
1 specimen
Dentalium leve Stephenson 1923
7 specimens
Cephalopoda - Ammonitida - Sphenodiscidae
Sphenodiscus ? sp. Meek 1871
2 specimens
Cephalopoda - Ammonitida - Scaphitidae
Scaphites sp. Parkinson 1811
1 specimen
Discoscaphites sp. Meek 1870
5 specimens
Cephalopoda - Ammonitida - Baculitidae
Baculites sp. Lamarck 1799
4 specimens
Bivalvia - Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758
38 specimens
Ostrea mesenterica Morton 1834
6 specimens
recombined as Lopha mesenterica
Ostrea aff. congesta Conrad 1843
2 specimens
Bivalvia - Ostreida - Flemingostreidae
Cubitostrea tecticosta (Gabb 1860)
2 specimens
Bivalvia - Ostreida - Gryphaeidae
Pycnodonte sp. (Fischer von Waldheim 1835)
2 specimens
Bivalvia - Pectinida - Entoliidae
Syncyclonema archeri
2 specimens
Syncyclonema sp. Meek 1864
3 specimens
Bivalvia - Arcida - Cucullaeidae
Idonearca sp. Conrad 1862
9 specimens
spelled with current rank as Cucullaea (Idonearca)
Bivalvia - Arcida - Parallelodontidae
Nemodon navarroanus
2 specimens
Nemodon grandis navarroanus
Nemodon sp. Conrad 1869
2 specimens
includes: N. sp. a (1), N. sp. (1)
Bivalvia - Arcida - Arcidae
Striarca webbervillensis
12 specimens
Bivalvia - Mytilida - Mytilidae
Volsella sp. Scopoli 1777
4 specimens
Bivalvia - Mytilida - Crenellidae
Crenella sp. Brown 1827
2 specimens
Bivalvia - Cardiida - Tellinidae
Tellina aff. munda
2 specimens
Tellina n. sp. aff. munda
Tellina sp. Linnaeus 1758
2 specimens
Bivalvia - Cardiida - Dreissenidae
Dreissena sp. Beneden 1835
2 specimens
Bivalvia - Cardiida - Mactridae
Cymbophora ? scabellum
1 specimen
Cymbophora sp. Gabb 1869
5 specimens
includes: C. sp. a (1), C. sp. (4)
Bivalvia - Pholadida - Corbulidae
Corbula aff. inflata
3 specimens
Corbula aff. rockensis
1 specimen
Corbula linteroidea
1 specimen
Corbula ? williardi
1 specimen
Corbula sp. Bruguière 1789
18 specimens
Bivalvia - Poromyida - Cuspidariidae
Cuspidaria sp. Dall 1886
3 specimens
C. sp. b (1), C. sp. (2)
Bivalvia - Lucinida - Lucinidae
Lucina sp. Bruguière 1797
1 specimen
Bivalvia - Carditida - Astartidae
Astarte aff. culebrensis
2 specimens
Astarte sp. Sowerby 1816
4 specimens
Bivalvia - Carditida - Carditidae
Vetericardiella webbervillensis
12 specimens
Vetericardiella sp. Chavan 1969
3 specimens
Bivalvia - Nuculanida - Nuculanidae
Nuculana aff. coloradoensis
1 specimen
Nuculana ? corbetensis
1 specimen
Nuculana corsicana
7 specimens
Nuculana houstoni
5 specimens
Nuculana sp. Link 1807
26 specimens
includes: N. sp. b (3), N. sp. c (1), N. sp. e (4), N. sp. (18)
Bivalvia - Solemyida - Solemyidae
Solemya cf. bilix
1 specimen
Bivalvia - Nuculida - Nuculidae
Nucula sp. Lamarck 1799
1 specimen
Gastropoda - Patellida - Lottiidae
Acmaea ? sp. Eschscholtz 1830
1 specimen
Gastropoda - Turritellidae
Turritella sp. Lamarck 1799
1 specimen
Gastropoda - Siphonariidae
Anisomyon sp. Meek and Hayden 1860
4 specimens
see common names

Geography
Country:United States State/province:Texas County:Falls
Coordinates: 31.3° North, 96.9° West (view map)
Paleocoordinates:36.6° North, 75.4° West
Basis of coordinate:based on political unit
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Maastrichtian 10 m.y. bin:Cretaceous 8
*Epoch:Senonian
*International age/stage:Late/Upper Maastrichtian
Key time interval:Late/Upper Maastrichtian Nannofossil zone: P. quadripunctata
Age range of interval:72.10000 - 66.00000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Corsicana Marl
Stratigraphy comments: Discoscaphites iris ammonoid zone - Landman et al., 2004
Lithology and environment
Primary lithology:shelly/skeletal,gray unlithified claystone
Includes fossils?Y
Lithology description: fossiliferous clay (described as a massive gray claystone with evenly dispersed shells in hansen et al. 1987)
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:mesofossils
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:bulk,mechanical,field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:5556
Authorizer:A. Miller Enterer:K. Layou
Modifier:M. Manojlovic Research group:GCP,marine invertebrate
Created:1999-10-13 13:04:32 Last modified:2016-07-25 12:50:20
Access level:the public Released:1999-10-13 13:04:32
Creative Commons license:CC BY
Reference information

Primary reference:
333. 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]

Secondary references:

29915 J. A. Sessa, T. J. Bralower, M. E. Patzkowsky, J. C. Handley, and L. C. Ivany. 2012. Environmental and biological controls on the diversity and ecology of Late Cretaceous through early Paleogene marine ecosystems in the US Gulf Coastal Plain. Paleobiology 38(2):218-239 [M. Patzkowsky/J. Sessa/J. Sessa]
28506 J. A. Sessa, M. E. Patzkowsky, and T. J. Bralower. 2009. Impact of lithification on the diversity, size distribution, and recovery dynamics of marine invertebrate assemblages. Geology 37(2):115-118 [M. Patzkowsky/J. Sessa/J. Sessa]