CM-1-13 (Brazos River K-T boundary, TX): Late/Upper Maastrichtian, Texas
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonoidea
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Ammonoidea indet.
Zittel 1884
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1 specimen | |||||||||
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Cephalopoda
- Ammonitida
- Scaphitidae
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Discoscaphites sp.
Meek 1870
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1 specimen | |||||||||
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Bivalvia
- Mytilida
- Mytilidae
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Brachiodontes sp.
Swainson 1840
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1 specimen | |||||||||
| [entered as Braciodontes sp.] | ||||||||||
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Bivalvia
- Ostreida
- Ostreidae
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Ostrea sp.
Linnaeus 1758
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16 specimens | |||||||||
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Ostrea aff. plumosa
Morton 1833
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1 specimen | |||||||||
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Ostrea mesenterica
Morton 1834
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4 specimens | |||||||||
| recombined as Lopha mesenterica | ||||||||||
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Bivalvia
- Ostreida
- Flemingostreidae
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Cubitostrea tecticosta
(Gabb 1860)
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2 specimens | |||||||||
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Bivalvia
- Arcida
- Arcidae
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Striarca webbervillensis
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2 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 |
| *Period: | Jurassic | *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: | all microfossils,some macrofossils,difficult macrofossils |
| Collection methods: | bulk,mechanical,field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 5565 | ||
| Authorizer: | A. Miller | Enterer: | K. Layou |
| Modifier: | J. Sessa | Research group: | GCP,marine invertebrate |
| Created: | 1999-10-15 08:09:47 | Last modified: | 2010-07-24 15:27:58 |
| Access level: | the public | Released: | 1999-10-15 08:09:47 |
| 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] |