| Pioche Shale | |
|---|---|
| Stratigraphic range: | |
 Olenellus fowleri from the Pioche Shale | |
| Unit of | Pioche Formation |
| Location | |
| Country | United States |
| Type section | |
| Named by | Charles Doolittle Walcott, 1908 |
The Pioche Shale is an Early to Middle Cambrian Burgess shale-type Lagerstätte in Nevada.[1] It spans the Early–Middle Cambrian boundary; fossils from the Early Cambrian are preserved in botryoidal hematite, whereas those from the Middle Cambrian are preserved in the more familiar carbon films, and very reminiscent of the Chengjiang County preservation.[1]
It preserves arthropods and worms familiar from the Burgess Shalel[2] and the kerygmachelid Mobulavermis was described from fossils found in the Pioche Shale in December 2023. [3]
It spans the early Cambrian Olenellus and basal Middle Cambrian Eokochaspis nodosa trilobite zones.[2]
The eastern version of this shale can be found eastwards in Grand Canyon, as the Bright Angel Shale.[4]
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References
- ^ a b Moore, R. A.; Lieberman, B. S. (2009). "Preservation of Early and Middle Cambrian soft-bodied arthropods from the Pioche Shale, Nevada, USA". Palaeogeography, Palaeoclimatology, Palaeoecology. 277 (1–2): 57–62. Bibcode:2009PPP...277...57M. doi:10.1016/j.palaeo.2009.02.014.
- ^ a b Lieberman, B. S. (2003). "A New Soft-Bodied Fauna: the Pioche Formation of Nevada". Journal of Paleontology. 77 (4): 674–690. doi:10.1666/0022-3360(2003)077<0674:ANSFTP>2.0.CO;2. ISSN 0022-3360.
- ^ McCall, Christian (13 December 2023). "A large pelagic lobopodian from the Cambrian Pioche Shale of Nevada". Journal of Paleontology. doi:10.1017/jpa.2023.63. Retrieved 13 December 2023.
- ^ Geology graphic of Pioche Shale & Bright Angel Shale at 3dpards.wr.usgs.gov [1]
External links
- Graphic of geology of area west-to-east for Lake Mead National Recreation Area (Nevada) & Grand Canyon (Arizona)
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This page was last edited on 17 June 2024, at 14:10