Pioche Shale, Bed 15 (Cambrian of the United States)

Where: White Pine County, Nevada (40.0° N, 115.0° W: paleocoordinates 3.2° S, 91.5° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Upper Member (Pioche Shale Formation), Delamaran (511.2 - 506.5 Ma)

• Listed as Lower to Middle Cambrian, Albertella biozone

• group of beds-level stratigraphic resolution

Environment/lithology: poorly lithified shale and lithified, fine-grained, black, gray limestone

• Shale (and weathered siltstone?) interbedded with medium to thin beds of medium to dark-gray and black, finely crystalline limestone

Size class: macrofossils

Collection methods: Trilobites only; articulates observed but not collected. Collection 15, 742 feet above base of formation

Primary reference: W. H. Fritz. 1968. Lower and early Middle Cambrian trilobites from the Pioche Shale, East-Central Nevada, U.S.A. Palaeontology 11:36-43 [P. Novack-Gottshall/P. Hearn/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 77204: authorized by Phil Novack-Gottshall, entered by Paul Hearn on 31.12.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Ptychopariida - Ptychopariidae
"Caborcella granosa" = Palmerara granosa Resser 1939 trilobite
Achlysopsis hemitora Fritz 1968 trilobite
Pachyaspis gallagari Fritz 1968 trilobite
 Ptychopariida - Alokistocaridae
Amecephalus laticaudum Resser 1939 trilobite
Bythicheilus sp. Resser 1939 trilobite
 Corynexochida - Zacanthoididae
Zacanthoides sp. Walcott 1888 trilobite
 Corynexochida - Dorypygidae
Kootenia crassa Fritz 1968 trilobite
 Corynexochida - Dolichometopidae
Poliella denticulata Rasetti 1951 trilobite
Artiopoda
 Agnostida - Eodiscidae
Pagetia clytia Walcott 1916