Station 8b, Caldwell Ranch, Bastrop Co., TX: Danian, Texas
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Ostracoda
- Podocopida
- Cytheruridae
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Cytheropteron (Cytheropteron) midwayensis n. sp.
Alexander 1934
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Texas | County: | Bastrop |
| Coordinates: | 30.2° North, 97.5° West (view map) | ||||
| Paleocoordinates: | 35.1° North, 78.2° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | small collection |
Time
| Period: | Paleogene | Epoch: | Paleocene |
| Stage: | Danian | 10 m.y. bin: | Cenozoic 1 |
| Key time interval: | Danian | ||
| Age range of interval: | 66.00000 - 61.60000 m.y. ago |
Stratigraphy
| Geological group: | Midway | Formation: | Wills Point | Member: | Mexia Clay |
| Stratigraphy comments: Station 8 of Alexander (1934) includes two collections. The one recorded here ("8b") is basal Wills Point Fm. (Mexia Clay Mbr.); "8a" is upper Kincaid Fm. and is entered as a separate collection.
Lower Mexia Clay Member is Danian according to: Armstrong, A., Nyborg, T., Bishop, G.A., Morales, À.O. and Vega, F.J., 2009. Decapod crustaceans from the Paleocene of Central Texas, USA. Revista Mexicana de Ciencias Geológicas, 26(3), pp.745-763. | |||||
Lithology and environment
| Primary lithology: | poorly lithified claystone |
| Lithology description: The dark, fossiliferous, glauconitic clay at the base of the bank is rich in Cucullea macrodonta Whitfield and lies near the top of the Kincaid formation and about 25 feet below the strata exposed at station 8. Foraminifera and ostracodes are numerous, and this has been selected as the type locality for Brachycythere plena n. sp., B. interrasilis n. sp., Cythereis midwayensis n. sp. and Cytheromorpha scrobiculata n. sp. | |
| Environment: | marginal marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | microfossils |
Collection methods and comments
| Collection methods: | bulk,sieve |
| Reason for describing collection: | taxonomic analysis |
| Taxonomic list comments:This references only lists taxa for which the locality is the type section. Other microfossils are reported to be present but not listed. | |
Metadata
| Database number: | 191250 | ||
| Authorizer: | S. Cole | Enterer: | S. Cole |
| Modifier: | S. Cole | ||
| Created: | 2018-01-18 13:38:15 | Last modified: | 2018-01-25 10:53:51 |
| Access level: | database members | Released: | 2019-01-18 13:38:15 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 64088. | C. I. Alexander. 1934. Ostracoda of the Midway (Eocene) of Texas. Journal of Paleontology 8(2):206-237 [S. Cole/S. Cole/G. Hunt] |