Cedar Brake Camp: Early/Lower Albian, Texas
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Chondrichthyes
- Rajiformes
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Pseudohypolophus mcnultyi
(Thurmond 1971)
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Actinopteri
- Pycnodontiformes
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Pycnodontiformes indet.
Berg 1937
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Texas | County: | Somervell |
| Coordinates: | 35.4° North, 102.4° West (view map) | ||||
| Paleocoordinates: | 34.0° North, 59.0° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
| Stage: | Albian | 10 m.y. bin: | Cretaceous 4 |
| *Period: | Early/Lower Cretaceous | *Epoch: | Gallic |
| Key time interval: | Early/Lower Albian | ||
| Age range of interval: | 113.00000 - 109.90000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Trinity | Formation: | Glen Rose Limestone | Member: | Lower |
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: fossils are apparently from a single bed
The Glen Rose formation spans through four ammonite zones with ages between latest Aptian and early Albian. Young 1974 suggested the Kasanskyella spathi ammonite zone is latest aptian, the Hypacanthoplites cragini zone is earliest Albian, the Douvilleiceras mammillatum and Hypacanthoplites comalensis zones are early Albian and may extend into the middle Albian. The Salenia texana Zone and Corbula bed fall within the mammillatum zone. The benthic foraminifera Orbitolina texana also suggests a late aptian - early albian age and is found in basal levels and in the upper member (Stricklin et al. 1971). Scott et al. (2007) estimated that the age of the Glen Rose Formation ranges from 113.3 to 108.0 Ma. | |||||
Lithology and environment
| Primary lithology: | "shale" |
| Secondary lithology: | mudstone |
| Lithology description: "shale/mudstone" | |
| Environment: | deltaic indet. |
| Geology comments: "primarily peritidal and marsh facies" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | mesofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Also known as: | SMU 223 | ||
| Database number: | 27603 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | G. Varnham | Research group: | marine invertebrate,vertebrate |
| Created: | 2002-12-13 16:18:08 | Last modified: | 2022-03-23 04:34:45 |
| Access level: | the public | Released: | 2002-12-13 16:18:08 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 7600. | D. A. Winkler, P. A. Murry, and L. L. Jacobs. 1990. Early Cretaceous (Comanchean) vertebrates of central Texas. Journal of Vertebrate Paleontology 10(1):95-116 [J. Alroy/J. Alroy/J. Alroy] |