Collection 41170 [Grassy Spring Mbr, Pioche Shale] (Cambrian of the United States)

Where: Lincoln County, Nevada (37.9° N, 114.5° W: paleocoordinates 3.4° S, 93.6° W)

• outcrop-level geographic resolution

When: Albertella trilobite zone, Grassy Spring Member (Pioche Shale Formation), Delamaran (513.0 - 505.0 Ma)

• AGE: Delamaran; refined by A. Hendy (6/2009) on the basis of biostratigraphic data (= Albertella zone).

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified packstone

• bioclastics (interpretted from figure 4. stratigraphic sections).

Collection methods: Only trilobites from the Albertella highlandensis subbiozone were collected.

Primary reference: J. D. Eddy and L. B. McCollum. 1998. Early Middle Cambrian Albertella biozone trilobites of the Pioche Shale, southeastern Nevada. Journal of Paleontology 72(5):864-887 [M. Patzkowsky/P. Borkow/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 9431: authorized by Mark Patzkowsky, entered by Phil Borkow on 02.11.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Corynexochida - Dorypygidae
Olenoides sp. Meek 1877 trilobite
1 cranidium (species is not identifyable)
 Corynexochida - Zacanthoididae
Albertella schenki n. sp. Resser 1945 trilobite
5 cranidia, 8 pygidia, 2 hypostomes