Litho #2, Split Mountain East Section (Cambrian of the United States)

Where: Esmeralda County, Nevada (37.7° N, 117.4° W: paleocoordinates 1.0° S, 93.5° W)

• outcrop-level geographic resolution

When: Eokochaspis nodosa trilobite zone, Lower Member (Emigrant Formation), Delamaran (511.2 - 506.5 Ma)

• informal lower limestone and siltstone

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified, black, gray shale

• a five meter thick, variegated shale consisting of interbedded pale red, light gray, black and tan layers, which begins at a bioclastic concretion layer.

Size class: macrofossils

Primary reference: L. B. McCollum and F. A. Sundberg. 1999. Biostratigraphy of the traditional Lower-Middle Cambrian boundary interval in the outher shelf Emigrant Formation, Split Mountain East Section, Esmeralda County, Nevada. Laurentai 99: V field conference of the Cambrian Stage Subdivision Working Group, International Subcomission on Cambrian Stratigraphy 29-34 [M. Patzkowsky/P. Borkow]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 10588: authorized by Mark Patzkowsky, entered by Phil Borkow on 25.05.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Corynexochida - Oryctocephalidae
Microryctocara nevadensis, Oryctocephalus indicus
Microryctocara nevadensis Sundberg and McCollum 1997 trilobite
Oryctocephalus indicus Reed 1910 trilobite
 Ptychopariida - Ptychopariidae
Syspacephalus cf. laticeps
Syspacephalus cf. laticeps Rasetti 1951 trilobite