LSJU loc. 23145, Cerro Gordo Spring Trail (Carboniferous of the United States)

Also known as Cerro Gordo Pipeline Trail; USGS loc. 10403-PC; USGS loc. 15336-PC; USGS loc. 15335-PC; Locality 22 of Merriam 1963

Where: Inyo County, California (36.6° N, 117.8° W: paleocoordinates 3.0° N, 47.2° W)

• coordinate estimated from map

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

• originally indicated as "White Pine Shale (Chainman Shale)" Late Arnsbergian age from Titus 2000

Environment/lithology: marine; metamorphosed, ferruginous, black, gray shale

• "grayish-black slightly altered shale"

Size classes: macrofossils, mesofossils

Preservation: mold/impression

Collected by Kirk; C. W. Merriam; ; reposited in the CAS, USGS

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 220592: authorized by Jonathan Marcot, entered by Jonathan Marcot on 10.06.2021

Creative Commons license: CC BY (attribution)

Taxonomic list

Plantae indet. Haeckel 1866
"Land plants (abundant, fragmentary ; one well-preserved fernlike type)"
Chondrichthyes indet. Huxley 1880 cartilaginous fish
"Shark teeth (coarsely serrated edge, 3/4 in. long)"
 Productida - Productellidae
 Productida - Productidae
Dictyoclostus sp.
"Dictyoclostus cf. D. burlingtonensis (Hall) or cf. D. fernglenensis (Weller)"
 Spiriferida - Spiriferidae
Spirifer sp. Sowerby 1818
"Spirifer cf. S. brazerianus Girty or cf. S. grimes Hall"
 Ostreida - Pterineidae
 Bactritida - Bactritidae
 Goniatitida -
Goniatitida indet. Hyatt 1884 ammonite
"Small goniatite with narrow venter; genus indeterminate"
 Goniatitida - Girtyoceratidae
Eumorphoceras bisulcatum Girty 1909 ammonite
USGS locs. 23145, 10403-PC, 15334-PC, and 15335-PC
 Goniatitida - Glaphyritidae
"Cravenoceras cf. richardsonianum" = Richardsonites richardsonianus, "Cravenoceras cf. nevadense" = Glaphyrites nevadensis
"Cravenoceras cf. richardsonianum" = Richardsonites richardsonianus Girty 1909 ammonite
"Cravenoceras cf. nevadense" = Glaphyrites nevadensis Miller and Furnish 1940 ammonite
 Goniatitida - Cravenoceratidae
 Nautilida -
Nautilida indet. Agassiz 1847 nautiloid
"?Nautilus sp. (large form. possibly a Liroceras)"
 Orthoceratoidea -
Orthocerida indet. Kuhn 1940
as Orthoceracone indet.
 Stauriida - Hapsiphyllidae
"Triplophyllites "sp. A"" = Amplexizaphrentis
"Triplophyllites "sp. A"" = Amplexizaphrentis Vaughan 1906 horn coral