The Walnut Formation is a geologic formation from the Albian Stage stretching from central Texas to southern Oklahoma. It is part of the Fredericksburg Group. The formation preserves fossils dating back to the Cretaceous period, notably marine invertebrates Exogyra texana, Gryphaea marcoui, and Carseyella walnutensis.[1][2][3]
| Walnut Formation | |
|---|---|
| Stratigraphic range: Cretaceous | |
| Type | Formation |
| Location | |
| Region | Texas, Oklahoma |
| Country | United States |
See also
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References
edit- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 25 March 2022. Retrieved 17 December 2021.
- ^ Schlagintweit, F. (2021). Time to say goodbye: taxonomic revision of Dictyoconus walnutensis (Carsey, 1926), the last Lower Cretaceous representative of the genus. Historical Biology, 33(11), 2977–2988. https://doi.org/10.1080/08912963.2020.1839065
- ^ Peterson, P., Smith, L., Gailloreto, N., Hanger, R. A., & Anonymous. (2009). Paleoecology of the Middle Cretaceous Walnut Formation, Bell County, Texas. Abstracts with Programs - Geological Society of America, 41(4), 16-.
- ^ Milton, W. B. (1928). The Walnut Formation of Central Texas (Publication or Document No.) [Master's thesis, University of Texas]. Texas Scholar Works.
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