Pyramid Peak (USGS 7191-CO): Delamaran, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Ptychopariida
Syspacephalus obscurus Palmer and Halley 1979
see common names

Geography
Country:United States State/province:California
Coordinates: 36.4° North, 116.6° West (view map)
Paleocoordinates:1.5° South, 94.9° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Cambrian
10 m.y. bin: Cambrian 3
Key time interval: Delamaran Trilobite zone:  Albertella
Age range of interval: 511 - 506.5 m.y. ago
Stratigraphy
Formation:Carrara Member:Pahrump Hills Shale
Stratigraphic resolution:member
Stratigraphy comments: The Pahrump Hills Shale Member is poorly fossiliferous,
but collections from different areas contain elements
of both the Zacanthoidid and Albertella-Mexicella Zonules
of the Albertella Zone.
Lithology and environment
Primary lithology:brown,green,red mudstone
Secondary lithology: "limestone"
Lithology description: The upper half of the member consists of a heterogeneous sequence of red, brown, and green mudstones and shales, chloritic and cryptalgal limestones, thin chloritic oolites, and pelloidal limestones.
Environment:coastal indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils,microfossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:149640
Authorizer:W. Kiessling Enterer:M. Krause
Modifier:J. Marcot Research group:marine invertebrate
Created:2013-08-19 20:34:08 Last modified:2022-08-02 16:17:32
Access level:authorizer only Released:2013-11-19 20:34:08
Creative Commons license:CC BY
Reference information

Primary reference:
47804. A. R. Palmer and R. B. Halley. 1979. Physical Stratigraphy and Trilobite Biostratigraphy of the Carrara Formation (Lower and Middle Cambrian) in the Southern Great Basin. United States Geological Survey Professional Paper 1047:1-131 [W. Kiessling/M. Krause/J. Ju]