Where: Nevada (37.7° N, 117.3° W)

• Paleocoordinates: 1.7° N, 162.9° W (Wright 2013)

• coordinate stated in text

When: Fritzaspis trilobite zone, Gold Coin Member (Campito Formation), Begadean (538.8 - 520.0 Ma)

• uppermost Andrews Mountain Member (up to 90m below the base of Montenegro Mbr) of the Campito Fm. It correlates to the lower Atdabanian.

•

•Hollingsworth (2011) named this the Gold Coin member of the Campito Formation. Fritzaspis zone is Begadean in age.

Environment/lithology: deep subtidal; lithified, bioturbated, gray, green sandstone

Size classes: macrofossils, mesofossils

Preservation: mold/impression

Collected by W. H. Fritz and J. S. Hollingsworth

Collection methods: quarrying, surface (float), surface (in situ)

• "The trilobites of the Fritzaspis assemblage are rare and difficult to find, while brachiopods are much more abundant. Over several field sessions, a total of about 200 hours were spent searching this stratigraphic interval to produce a collection of 60 cephala and a few large cephalic fragments. Over 50 hours were spent similarly searching the Andrews Mountain Member below this interval without finding any trilobite material; only trace fossils and two indistinct hyoliths were discovered."

Primary reference: J. S. Hollingsworth. 2007. Fallotaspidoid trilobite assemblage (Lower Cambrian ) from the Esmeralda Basin (western Nevada, USA): The oldest trilobites from Laurentia. Memoirs of the Association of Australasian Palaeontologists 33:123-140 [A. Lin/A. Lin/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 90901: authorized by Alex Lin, entered by Alex Lin on 24.08.2009

Creative Commons license: CC0 (CC0)