Locality KM (Lower Choza Fm.) : Leonardian, Texas
collected by E. C. Olson 1949
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Amphibia
- Diplocaulidae
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Diplocaulus recurvatus
Olson 1952
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Chondrichthyes
- Xenacanthiformes
- Xenacanthidae
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Xenacanthus cf. platypternus
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Texas | County: | Foard |
| Coordinates: | 33.8° North, 99.6° West (view map) | ||||
| Paleocoordinates: | 2.2° North, 29.0° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Permian | Epoch: | Cisuralian |
| 10 m.y. bin: | Permian 2 | ||
| Key time interval: | Leonardian | ||
| Age range of interval: | 286.1 - 273.01 m.y. ago |
Stratigraphy
| Geological group: | Clear Fork | Formation: | Choza | ||
| Stratigraphy comments: Lower part of the Choza Fm. | |||||
Lithology and environment
| Primary lithology: | green,red,yellow "shale" | ||
| Secondary lithology: | conglomerate | ||
| Includes fossils? | Y | ||
| Lithology description: "Varied red, green, and yellow shales, with evenness of bedding increasing to west. Anhydrite abundant in western part. Pond shales in western half of area. A thin sheet of fine conglomerate, with lenses suggesting channels, is present over a wide area in the central and western parts of the locality. It occurs near the base of the exposed section." (Olson, 1958) | |||
| Environment: | pond | Tectonic setting: | foreland basin |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | variable |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis | ||
| Collectors: | E. C. Olson | Collection dates: | 1949 |
Metadata
| Database number: | 177018 | ||
| Authorizer: | R. Butler | Enterer: | E. Dunne |
| Modifier: | E. Dunne | Research group: | vertebrate |
| Created: | 2016-03-16 05:29:08 | Last modified: | 2018-01-24 10:51:43 |
| Access level: | the public | Released: | 2016-03-16 05:29:08 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 58444. | E. C. Olson. 1958. Fauna of the Vale and Choza: Summary, Review, and Integration of the Geology and the Faunas. Fieldiana Geology 10(32):397-448 [R. Butler/E. Dunne] |