USGS 14583: Cenomanian, Texas
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Myalinida
- Inoceramidae
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Inoceramus arvanus
Stephenson 1953
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Bivalvia
- Ostreida
- Gryphaeidae
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Exogyra columbella
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1 specimen | |||||||||
| sm. internal mold | ||||||||||
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Cephalopoda
- Ammonitida
- Acanthoceratidae
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Euomphaloceras alvaradoense
(Moreman 1942)
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| "considerable numbers" | ||||||||||
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= Acanthoceras amphibolum
Morrow 1935
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Kennedy et al. 1988 | |||||||||
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Tarrantoceras stantoni
Stephenson 1955
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| synonym of Tarrantoceras (Tarrantoceras) sellardsi | ||||||||||
| n. sp. | ||||||||||
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Tarrantoceras multicostatum
Stephenson 1955
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| synonym of Tarrantoceras (Tarrantoceras) sellardsi | ||||||||||
| n. sp. | ||||||||||
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Acanthoceras johnsonanum
Stephenson 1955
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1 specimen | |||||||||
| recombined as Cunningtoniceras johnsonanum | ||||||||||
| n. sp. | ||||||||||
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Euomphaloceras lonsdalei
(Adkins 1928)
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| recombined as Cunningtoniceras lonsdalei | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Texas | County: | Johnson |
| Coordinates: | 32.4° North, 97.2° West (view map) | ||||
| Paleocoordinates: | 30.8° North, 62.1° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 | *Epoch: | Gallic |
| Key time interval: | Cenomanian | ||
| Age range of interval: | 100.50000 - 93.90000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Eagle Ford | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: From the basal 10 ft | |||||
Lithology and environment
| Primary lithology: | lithified calcareous sandstone | ||
| Secondary lithology: | "shale" | ||
| Environment: | marine indet. | Tectonic setting: | cratonic basin |
| Geology comments: Sandstone, thin, platy; interbedded shale; lrg. ovate concretionary fine calcareous sandstone, 1 ft. thick, showing effects of crushing by pressure from above. | |||
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | surface (in situ),mechanical,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USGS |
| Taxonomic list comments:abundance data inconsistent: sometimes quantitative, other times qualitative, or not even given. see comment field for info. | |
Metadata
| Database number: | 2125 | ||
| Authorizer: | J. Alroy, P. Wagner | Enterer: | M. Sommers, P. Wagner |
| Modifier: | M. Carrano | Research group: | marine invertebrate |
| Created: | 1999-06-22 14:24:01 | Last modified: | 2012-02-01 10:42:50 |
| Access level: | the public | Released: | 1999-06-22 14:24:01 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 54. | L. W. Stephenson. 1955. Basal Eagle Ford fauna (Cenomanian) in Johnson and Tarrant Counties, Texas. United States Geological Survey Professional Paper 274-C:53-67 [J. Alroy/M. Sommers/A. Clement] |
Secondary references:
| 59155 | W. J. Kennedy, W. A. Cobban, and S. C. Hook. 1988. Middle Cenomanian (Late Cretaceous) molluscan fauna from the base of the Boquillas Formation, Cerro de Muleros, Dona Ana County, New Mexico. New Mexico Bureau of Mines & Mineral Resources Bulletin 114:35-44 [M. Clapham/M. Clapham] |