ammonites
USNM 41748, Log Cabin Mbr, Pan American Mine (Cambrian of the United States)

Also known as 41748

Where: Lincoln County, Nevada (37.9° N, 114.6° W: paleocoordinates 3.2° S, 93.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Log Cabin Shale Member (Pioche Shale Formation), St Davids (513.0 - 501.0 Ma)

• At 78 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 50322: authorized by Austin Hendy, entered by Austin Hendy on 12.05.2005

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)