Where: Inyo County, California (36.8° N, 117.5° W: paleocoordinates 3.0° N, 46.9° W)

• coordinate estimated from map

When: Rest Spring Formation, Arnsbergian (327.0 - 323.7 Ma)

• McAllister (1952) and Gordon (1964) say this is the uppermost 10 ft and probably lower 5 ft of Rest Spring Shale

•If Perdido group, this would be the Mexican Spring Formation of Stevens et al., 1996

•Titus (2000) says this is lower Rest Spring Shale, but doesn't give any evidence. Says "the formational contact between the Rest Spring Shale and the underlying Mexican Spring Formation essentially coincides with the Pendleian-Arnsbergian boundary" making this Arnsbergian if Rest Spring, or Pendleian if Mexican Spring.

Environment/lithology: marine; fine-grained, gray limestone and calcareous siltstone

Size class: macrofossils

Reposited in the CAS

Collection methods: surface (float),

Primary reference: M. Gordon, Jr. 1964. California Carboniferous cephalopods. United States Geological Survey Professional Paper 483-A:A1-A27 [J. Marcot/J. Marcot/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 217143: authorized by Jonathan Marcot, entered by Jonathan Marcot on 26.01.2021

Creative Commons license: CC BY (attribution)