WP-1, Westgard Pass [Upper Poleta Fm]: Dyeran, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Eocrinoidea
Eocrinoidea indet. Jaekel 1918
Helicoplacoidea - Helicoplacidae
Helicoplacus gilberti Durham and Caster 1963
Wilbur 2006
Waucobella nelsoni Durham 1967
Wilbur 2006
Polyplacus kilmeri Durham 1967
Wilbur 2006
see common names

Geography
Country:United States State/province:California County:Inyo
Coordinates: 37.3° North, 118.2° West (view map)
Paleocoordinates:0.1° North, 97.1° West
Basis of coordinate:based on nearby landmark
Time
Period: Cambrian Epoch: Series 2
10 m.y. bin: Cambrian 2-3
Key time interval: Dyeran Trilobite zone:  Nevadella - Holmia
Age range of interval: 514.8 - 511 m.y. ago
Age estimate: 518.4 to 515.4 Ma (unknown)
Stratigraphy
Formation:Poleta Member:Upper
Stratigraphic resolution:member
Stratigraphy comments: PMNG: Nevadella biozone ranges 518.4 - 515.4 Ma according to Gradstein, et al. (2020).
Lithology and environment
Primary lithology: lithified calcareous mudstone
Environment:offshore indet. Tectonic setting:passive margin
Taphonomy
Modes of preservation:mold/impression
Lagerst�tten type:conservation
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection methods:selective quarrying,surface (float),surface (in situ)
Reason for describing collection:taxonomic analysis
Museum repositories:LACM,TMM,UCMP,USNM
Metadata
Database number:90625
Authorizer:A. Lin Enterer:A. Lin
Modifier:P. Novack-Gottshall Research group:marine invertebrate
Created:2009-08-11 10:29:44 Last modified:2024-06-01 06:10:57
Access level:the public Released:2009-08-11 10:29:44
Creative Commons license:CC BY
Reference information

Primary reference:

22459. J. Sprinkle. 1973. Morphology and evolution of blastozoan echinoderms. Harvard University Museum of Comparative Zoology, Special Publication 1-283 [G. Webster/G. Webster/P. Wagner]

Secondary references:

30495 B. C. Wilbur. 2006. Reduction in the number of Early Cambrian helicoplacoid species. Palaeoworld 15:283-293 [A. Lin/A. Lin/A. Lin]