Pioche Shale

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 Shale.[2]

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.[3]

References
  1. 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: 57–62. doi:10.1016/j.palaeo.2009.02.014.
  2. 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.
  3. Geology graphic of Pioche Shale & Bright Angel Shale at 3dpards.wr.usgs.gov


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.