USGS Mesozoic D10742, Chispa Summit: Middle Cenomanian, Texas
collected by S.C. Hook, W.A. Cobban 1979
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Myalinida
- Inoceramidae
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Inoceramus aff. arvanus
Stephenson 1953
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Kennedy et al. 1989 | ||||||
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Bivalvia
- Ostreida
- Ostreidae
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Ostrea beloiti
Logan 1899
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Kennedy et al. 1989 | ||||||
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Cephalopoda
- Ammonitida
- Turrilitidae
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Turrilites acutus
Passy 1832
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Kennedy et al. 1989 | ||||||
| recombined as Turrilites (Turrilites) acutus | |||||||
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Cephalopoda
- Ammonitida
- Acanthoceratidae
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? Acompsoceras sp.
Hyatt 1903
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Kennedy et al. 1989 | ||||||
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Tarrantoceras spp.
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Kennedy et al. 1989 | ||||||
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Tarrantoceras sellardsi
(Adkins 1928)
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| recombined as Tarrantoceras (Tarrantoceras) sellardsi | |||||||
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"Eucalycoceras" leonense
Adkins 1928
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Kennedy et al. 1989 | ||||||
| recombined as Calycoceras (Gentoniceras) leonense | |||||||
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Cunningtoniceras johnsonanum
(Stephenson 1955)
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Kennedy et al. 1989 | ||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Texas | County: | Jeff Davis |
| Coordinates: | 30.7° North, 104.8° West (view map) | ||||
| Paleocoordinates: | 30.9° North, 69.8° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 |
| Key time interval: | Middle Cenomanian | Ammonoid zone: | Acanthoceras bellense |
| Age range of interval: | 100.50000 - 93.90000 m.y. ago |
Stratigraphy
| Formation: | Chispa Summit | ||||
| Regional section: | Formation | Regional bed: | 4.6 m | ||
| Regional order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: 4.6 m (15 ft) above base; was Acanthoceras amphibolum zone | |||||
Lithology and environment
| Primary lithology: | lithified not reported |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | USNM | ||
| Collectors: | S.C. Hook, W.A. Cobban | Collection dates: | 1979 |
Metadata
| Database number: | 177076 | ||
| Authorizer: | M. Clapham, P. Wagner | Enterer: | M. Clapham, P. Wagner |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2016-03-18 23:50:40 | Last modified: | 2023-07-22 00:25:32 |
| Access level: | the public | Released: | 2016-03-18 23:50:40 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 58501. | W. A. Cobban. 1988. Tarrantoceras Stephenson and related ammonoid genera from Cenomanian (Upper Cretaceous) rocks in Texas and the western interior of the United States. United States Geological Survey Professional Paper 1473:1-30 [M. Clapham/M. Clapham] |
Secondary references:
| 85357 | W. J. Kennedy, W. A. Cobban, J. M. Hancock and S. C. Hook. 1989. Biostratigraphy of the Chispa Summit Formation at its type locality: a Cenomanian through Turonian reference section for Trans-Pecos Texas. Bulletin of the Geological Institutions of the University of Uppsala 15:39-119 [P. Wagner/P. Wagner] |