Grapevine Mountains (USGS 7234-CO) (Cambrian of the United States)

Where: California (36.8° N, 117.1° W: paleocoordinates 1.2° S, 94.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Plagiura-Poliella trilobite zone, Pyramid Shale Member (Carrara Formation), Delamaran (513.0 - 505.0 Ma)

• Aside from those occurrences only a single specimen questionably identified as Mexicella? stator (Walcott) was found on a float piece from the middle part of this member in the Titanothere Canyon section in the Grapevine Mountains.

• member-level stratigraphic resolution

Environment/lithology: coastal; green shale and brown siltstone

• The member is primarily a green shale interbedded

•with brown and maroon siltstone and shale with minor

•amounts of quartzite and limestone.

Size classes: macrofossils, mesofossils, microfossils

Primary reference: A. R. Palmer and R. B. Halley. 1979. Physical Stratigraphy and Trilobite Biostratigraphy of the Carrara Formation (Lower and Middle Cambrian) in the Southern Great Basin. United States Geological Survey Professional Paper 1047:1-131 [W. Kiessling/M. Krause/J. Ju]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 149615: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 16.08.2013, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Ptychopariida -
Mexicella robusta Sundberg and McCollum 2000 trilobite