Central Great Basin, Orr Fm., John's Wash Mbr., Dunderbergia zone, Shoaling Shel (Cambrian of the United States)

Where: Nevada (36.2° N, 115.1° W: paleocoordinates 3.9° S, 91.2° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Dunderbergia zone, John's Wash Member (Orr Formation), Dresbachian (497.0 - 485.4 Ma)

• "Dunderbergia zone"

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; carbonate

• "shoaling shelf community, carbonate (silty wackestones), ocean facing shelf, subtidal, above wavebase (BA3), miogeocline"

Size class: macrofossils

Primary reference: D. J. McBride. 1976. Outer shelf communities and trophic groups in the Upper Cambrian of the Great Basin. Brigham Young University Geology Studies 23(2):139-152 [P. Novack-Gottshall/P. Hearn/J. Ju]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 240: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "D.J.McBride 1976. Outer shelf communities and trophic groups in the Upper Camb. of the Great Basin. BYU Geol Studies 23(2):139-15[?illeg.]."
Show authors, comments, and common names
Trilobita
 Olenida - Aphelaspidae
Erixanium sp.
Erixanium sp. Opik 1963 trilobite
originally entered as "Eriyanium sp."
 Olenida - Pterocephaliidae
Sigmocheilus sp., Strigambitus sp., Morosa sp.
Sigmocheilus sp. Palmer 1960 trilobite
Strigambitus sp. Palmer 1965 trilobite
Morosa sp. Palmer 1960 trilobite
 Ptychopariida - Elviniidae
Elburgia sp., Dunderbergia sp., Dytremacephalus sp.
Elburgia sp. Palmer 1960 trilobite
Dunderbergia sp. Walcott 1924 trilobite
Dytremacephalus sp. Palmer 1954 trilobite
 Ptychopariida - Phylacteridae
Aphelotoxon sp.
Aphelotoxon sp. Palmer 1965 trilobite
Artiopoda
 Agnostida - Agnostidae
Homagnostus sp.
Homagnostus sp. Howell 1935
Lingulata
 Acrotretida -
Acrotretida indet.
 Lingulida -
Lingulida indet.
Lingulida indet. Waagen 1885