Английская Википедия:Bell Springs Formation
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Шаблон:Short description Шаблон:Infobox rockunit
The Bell Springs is a member of the Nugget Sandstone in Wyoming and a formation in Utah.[1] It is a Late Triassic (Norian to Rhaetian)[2] Fossil theropod tracks assigned to Agialopous wyomingensis have been reported from the formation.[3][4]
The formation composed of very fine grained limy sandstone that is distinguished from upper part of Nugget by presence of red to purple-red shale and lime cemented siltstone in beds less than 0.1 ft thick and by presence of calcareous firmly indurated beds 1-4 ft thick that are ripple laminated and weather to square faced ledges. May correlate with upper part of Chinle Formation. [5]
See also
References
Bibliography
- ↑ Шаблон:Cite web
- ↑ Bell Springs Formation at Fossilworks.org
- ↑ Weishampel et al., 2004, pp.517-607
- ↑ Branson & Mehl, 1932
- ↑ Pipiringos, G.N., 1968, Correlation and nomenclature of some Triassic and Jurassic rocks in south-central Wyoming, IN Shorter contributions to general geology, 1967: U.S. Geological Survey Professional Paper, 594-D, p. D1-D26.
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- Английская Википедия
- Geologic formations of Wyoming
- Triassic System of North America
- Triassic geology of Wyoming
- Norian Stage
- Rhaetian Stage
- Sandstone formations of the United States
- Ichnofossiliferous formations
- Paleontology in Wyoming
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