Unit 9, Pioche Shale Formation: Caerfai - St Davids, Nevada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Redlichiida - Olenellidae
Paedeumias sp. Walcott 1910
spelled with current rank as Olenellus (Paedeumias)
Fremontia sp. Raw 1936
synonym of Mesonacis
see common names

Geography
Country:United States State/province:Nevada County:Clark
Coordinates: 36.2° North, 115.0° West (view map)
Paleocoordinates:2.8° South, 97.1° West
Basis of coordinate:estimated from map
Time
Period:Cambrian
*Period:Early/Lower Cambrian - Middle Cambrian *Epoch:Caerfai
Key time interval:Caerfai - St Davids
Age range of interval:538.80000 - 497.00000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Pioche Shale
Local section:Unit 9 Local bed:Unit 9
Local order:bottom to top
Stratigraphic resolution:group of beds
Stratigraphy comments: 10 feet thick
Lithology and environment
Primary lithology:green lithified sandy "shale"
Lithology description: Shale, green sandy, fissile.
Environment:marginal marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Taxonomic list comments:Does not include annelids which were undescribed but found in the formation interval.
Metadata
Database number:9623
Authorizer:M. Patzkowsky Enterer:P. Borkow
Modifier:J. Marcot Research group:marine invertebrate
Created:2001-03-23 08:27:34 Last modified:2023-04-11 13:39:10
Access level:the public Released:2001-03-23 08:27:34
Creative Commons license:CC BY
Reference information

Primary reference:
596. P. D. Pack and H. B. Gayle. 1971. A new Olenellid trilobite, Biceratops nevadensis, from the Lower Cambrian near Las Vegas, Nevada. Journal of Paleontology 45(5):893-898 [M. Patzkowsky/P. Borkow/J. Alroy]