D 812 CO (Ordovician of the United States)

Also known as SF 457

Where: Nye County, Nevada (38.3° N, 116.4° W: paleocoordinates 4.7° S, 85.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Hintzeia celsaora - Protopliomerella contracta trilobite zone, Goodwin Formation, Tulean (480.8 - 474.9 Ma)

• Ibexian; G?

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal ramp; lithified limestone and lithified conglomerate

• carbonate ramp, above storm wave base
• flat-pebble; grey; poorly developed silicification

Size class: macrofossils

Preservation: replaced with silica

Collected by J. Ross, Jr.

Collection methods: surface (float),

Primary reference: R. J. Ross, Jr. and C. R. Longwell. 1964. Middle and Lower Ordovician Formations in Southernmost Nevada and Adjacent California. United States Geological Survey Bulletin 1180-C:C1-C101 [S. Finnegan/S. Finnegan/J. Marcot]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 104343: authorized by Seth Finnegan, entered by Seth Finnegan on 07.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Corynexochida - Leiostegiidae
Leiostegium sp.
Leiostegium sp. Raymond 1913 trilobite
 Corynexochida - Illaenidae
Illaenidae indet.
Illaenidae indet. Hawle and Corda 1847 trilobite
"Illaenid"
 Asaphida - Asaphidae
Trigonocerca sp., Asaphellus sp.
Trigonocerca sp. Ross 1951 trilobite
Asaphellus sp. Callaway 1877 trilobite
 Asaphida - Remopleurididae
Scinocephalus aff. solitecti
Scinocephalus aff. solitecti Ross 1951 trilobite