Where: Plumas County, California (39.7° N, 120.6° W: paleocoordinates 13.4° N, 42.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Goodhue Greenstone Formation, Cisuralian (298.9 - 273.0 Ma)

• Lithology and provenance suggests it is likely from the Goodhue Formation.

Environment/lithology: marine; tuff

Size class: macrofossils

Collected by J.H. Menke in 1931

Collection methods: surface (float)

Primary reference: H. Wheeler. 1939. Helicoprion in the Anthracolithic (Late Paleozoic) of Nevada and California, and its stratigraphic significance. Journal of Paleontology 13(1):103-114 [M. Clapham/D. Robinson]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 118113: authorized by Matthew Clapham, entered by David Robinson on 06.10.2011

Creative Commons license: CC BY (attribution)