Pyramid Peak (USGS 4159-CO) (Cambrian of the United States)

Where: California (36.4° N, 116.6° W: paleocoordinates 1.5° S, 94.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Albertella trilobite zone, Jangle Limestone Member (Carrara Formation), Delamaran (513.0 - 505.0 Ma)

• The lower part of the Jangle Limestone Member in the southeastern part of the outcrop area of the Carrara Formation has yielded several small low-diversity collections of trilobites that are typical of the Albertella-Mexicella Zonule of the Albertella Zone.

• member-level stratigraphic resolution

Environment/lithology: shallow subtidal; gray, white lime mudstone and burrowed, black mudstone

• Lateral transitions in the Jangle Limestone Member from

•light-gray or white laminated limestone to black burrowed

•mudstones are evident in the sections at Echo

•Canyon, Pyramid Peak, and Eagle Mountain.

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 149643: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 19.08.2013, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Ptychopariida -
Mexicella mexicana Lochman 1948 trilobite
 Ptychopariida - Ptychopariidae
Volocephalina contracta Palmer and Halley 1979 trilobite
 Corynexochida - Zacanthoididae
Albertella spectrensis Palmer and Halley 1979 trilobite