Unit 10, Clark County [Pioche Shale Fm]: Dyeran, Nevada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Annelida indet. Lamarck 1809
Trilobita - Redlichiida - Olenellidae
Biceratops nevadensis Pack and Gayle 1971
Fremontia sp. Raw 1936
synonym of Mesonacis
Paedumias sp. (Walcott 1910)
spelled with current rank as Olenellus (Paedeumias)
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, 96.8° West
Basis of coordinate:estimated from map
Time
Period:Cambrian Epoch:Series 2
10 m.y. bin:Cambrian 2-3
*Period:Early/Lower Cambrian - Middle Cambrian *Epoch:Caerfai
Key time interval:Dyeran
Age range of interval:514.80000 - 511.00000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Pioche Shale
Local section:Clark County Local bed:Unit 10
Local order:bottom to top
Stratigraphic resolution:group of beds
Stratigraphy comments: 5 feet thick. AGE: Dyeran; refined by A. Hendy (6/2009) on the basis of biostratigraphic data.
Lithology and environment
Primary lithology:red or brown lithified sandstone
Secondary lithology: lithified sandstone
Includes fossils?Y
Includes fossils?Y
Lithology description: Sandstone, interstratified, very fine-grained beds; 10% grey sandy shale; 20% dark grey shaley sandstone; 30% green shaley sandstone; 40 % hard brown sandstone all in lenses and thin strata.
Environment:marine indet.
Taphonomy
Modes of preservation:cast
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Collection method comments: Contains abundant trilobites and worm casts. Annelids not identified.
Metadata
Database number:9622
Authorizer:M. Patzkowsky Enterer:P. Borkow
Modifier:J. Marcot Research group:marine invertebrate
Created:2001-03-23 08:26:08 Last modified:2023-04-11 13:38:49
Access level:the public Released:2001-03-23 08:26:08
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]