UCMP loc. B-1068, Lower Rest Spring Gulch section, Cottonwood Range (Carboniferous of the United States)

Where: Inyo County, California (36.8° N, 117.5° W: paleocoordinates 6.4° S, 53.6° W)

• coordinate estimated from map

When: Leaning Rock Formation (Perdido Group), Osagean (352.0 - 343.0 Ma)

• Lower Perdido formation.

Environment/lithology: lithified, lenticular, coarse-grained, shelly/skeletal, black, argillaceous, cherty/siliceous packstone

• Limestone, coarse-grained crinoidal to very fine-grained ; black, weathering dark gray ; lenticular masses of coarse limestone embedded in layers of argil laceous limestone and flint as much as 6 inches thick, lens on traverse about 20 feet long and 5 feet thick ; beds of finer-grained material deflected by coarse lenses. Sample B-1068, 2.6 per cent insoluble residue of white to black silt with silicified fossil fragments ; texture of fossil fragments, generally about 3 mm in diameter but reaching 7 mm in diameter, in matrix of very fine-grained calcite.

•Limestone, very fine-grained ; black, weathering black ; beds 2 inches to 2 feet thick, shale weathering purple buff on bedding planes ; unit becomes more shaly toward top and weathers lighter gray toward top ; chert-free.

Size class: macrofossils

Preservation: replaced with silica

Collected by R. L. Langenheim, Jr., and J. H. Langenheim; reposited in the UCMP

Collection methods: surface (float)

Primary reference: R. L. Langenheim, Jr. and H. Tischler. 1960. Mississippian and Devonian paleontology and stratigraphy, Quartz Spring area Inyo County, California. University of California Publications in Geological Sciences 38(2):89-152 [J. Marcot/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 226821: authorized by Jonathan Marcot, entered by Jonathan Marcot on 29.07.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Anthozoa
  -
Anthozoa indet.
Anthozoa indet. Ehrenberg 1834
"Small silicified simple tetracorals"
Rhynchonellata
 Spiriferida - Spiriferidae
Spirifer sp.
Spirifer sp. Sowerby 1818
 Spiriferida - Ambocoeliidae
? Crurithyris sp.
? Crurithyris sp. George 1931
Strophomenata
 Productida -
Marginifera sp.
Marginifera sp. Waagen 1884
Bryozoa
 Fenestellida -
Fenestellida indet.
Fenestellida indet.
p. 98: "fenestellid bryozoa", 'silicified bryozoa"
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
"crinoid columnals"