Stewarts Mill, near Goldfield [Poleta Fm] (Cambrian of the United States)

Also known as HG#492.1

Where: Nevada (37.7° N, 117.2° W: paleocoordinates 3.5° S, 96.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Nevadella trilobite zone, Poleta Formation, Montezuman (530.0 - 516.0 Ma)

• AGE: Nelson (1976, 1978) places the Poleta Formation on the boundary between the Nevadella and Bonnia-Olenellus trilobite zones, with the lower Poleta Formation (from which this collection is described) within the Nevadella zone; age revised by A. Hendy (5/2009) from "Cambrian" to Montezuman following Streng et al. (2005).

• member-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified, hardground limestone

• Organisms described here lived in cavities within the Archaeocyathid patch reefs.
• Archaeocyathid patch reefs in the lower limestone member of the Poleta Fm

Size classes: macrofossils, mesofossils, microfossils

Primary reference: D. R. Kobluk. 1981. Earliest cavity-dwelling organisms (coelobionts), Lower Cambrian Poleta Formation, Nevada. Canadian Journal of Earth Sciences 18(4):669-679 [M. Patzkowsky/Z. Krug/Z. Krug]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 41017: authorized by Mark Patzkowsky, entered by Zack Krug on 05.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Renalcis sp. Vologdin
Archaeotrypa indet.
"a skeletal organism similar to Archaeotrypa"
Porifera indet. Grant 1836
"soft-bodied sponges"
 Archaeocyathida -
Archaeocyathida indet. Okulitch 1935
"unidentified juvenile archaeocyathids"
 Algae -