USNM 41757, Log Cabin Mbr, Upper Klondike Gap (Cambrian of the United States)

Also known as 41757

Where: Lincoln County, Nevada (37.8° N, 114.6° W: paleocoordinates 3.2° S, 93.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Log Cabin Shale Member (Pioche Shale Formation), St Davids (509.0 - 497.0 Ma)

• At 25 m above the base of the Log Cabin Member. Probably correlates to Delamaran stage. Early Middle Cambrian in age.

• bed-level stratigraphic resolution

Environment/lithology: marine; bioturbated, silty mudstone

• The Log Cabin Member is part of a fourth or fifth order cycle bounded by erosional surfaces. The overall lithostratigraphic package shown by the Log Cabin Member is of a coarsening and shallowing upward succession, consistent with a highstand systems tract deposit.
• Bioturbated silty mudstone

Size class: macrofossils

Reposited in the USNM

• Described specimens are deposited in the US National Museum, Washington, D.C. No preparatory or collection methods described.

Primary reference: F. A. Sundberg and L.B. McCollum. 2003. Trilobites of the lower Middle Cambrian Poliella denticulata biozone (new) of southeastern Nevada. Journal of Paleontology 77(2):331-359 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 50336: authorized by Austin Hendy, entered by Austin Hendy on 12.05.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for trilobites.
Show authors, comments, and common names
Trilobita
 Corynexochida - Dolichometopidae
"Poliella cf. prima" = Bathyuriscus (Poliella) primus, Poliellaites gloriosa
"Poliella cf. prima" = Bathyuriscus (Poliella) primus Walcott 1908 trilobite
Poliellaites gloriosa Sundberg and McCollum 2003 trilobite
 Ptychopariida -
Hadrocephalites sp.
Hadrocephalites sp. Sundberg and McCollum 2002 trilobite
 Ptychopariida - Ptychopariidae
Kochiella brevaspis
Kochiella brevaspis Sundberg and McCollum 2002 trilobite