Chisholm Shale. Lincoln County, Nevada - Bell 1978 (Cambrian of the United States)

Where: Lincoln County, Nevada (37.9° N, 114.5° W: paleocoordinates 3.3° S, 93.1° W)

• local area-level geographic resolution

When: Glossopleura zone, Chisholm Shale Formation, Solvan (510.2 - 504.5 Ma)

• All mine/pit excavations are from the same thin stratigraphic interval of approximately 9-11 meters below the contact between the Chisholm and the massive Highland Peak Formation at Chisholm Mine. The shale producing the fossils has very few "worm" burrows.

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, yellow shale

• 1.5-1.8 meters interval of pink, yellow, tan, brown, white, or red-banded, blocky or irregularly fissile, and silty with limonite joints shale.

Collection methods: All specimens are flattened which distort shape, morphology, and plate relationships.

Primary reference: B. M. Bell and J. Sprinkle. 1978. Totiglobus, an unusual new edrioasteroid from the Middle Cambrian of Nevada. Journal of Paleontology 52(2):243-266 [M. Patzkowsky/P. Borkow/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 7899: authorized by Mark Patzkowsky, entered by Phil Borkow on 06.06.2000, edited by Alex Lin

Creative Commons license: CC BY (attribution)

Taxonomic list

• Taxonomic list includes inarticulate brachiopods, trilobites, and other echinoderms which were found in the horizon, but not described at the genus/species level.
unclassified
  -
Eocrinoidea
 Gogiida - Eocrinidae
Gogia longidactylus Walcott 1886
Gogia longidactylus Walcott 1886
Edrioasteroidea
  -
Edrioasteroidea indet. Billings 1858
 Edrioasterida - Totiglobidae
Totiglobus nimius n. gen. n. sp.
Totiglobus nimius n. gen. n. sp.
Trilobita
  -
Trilobita indet. Walch 1771 trilobite
Inarticulata
  -