D1857 CO (Ordovician of the United States)

Also known as SF 24

Where: Nye County, Nevada (38.5° N, 116.4° W: paleocoordinates 6.1° S, 80.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: M-N brachiopod zone, Middle Member (Antelope Valley Formation), Whiterockian (470.0 - 457.3 Ma)

• Whiterockian; no formal stage

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified limestone

• carbonate platform
• silty; irregularly laminated; sponges common

Size class: macrofossils

Preservation: replaced with silica

Collected by J. Ross, Jr.

Collection methods: surface (float),

Primary reference: R. J., J.r. Ross. 1970. Ordovician Brachiopods, Trilobites, and Stratigraphy in Eastern and Central Nevada. United States Geological Survey Professional Paper 639:1-99 [S. Finnegan/S. Finnegan/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 104379: 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
 Asaphida - Asaphidae
Basilicus mckeei
Basilicus mckeei Ross 1970 trilobite
same as in D 1508 CO, D 1511 CO from Ikes Cyn
 Asaphida - Nileidae
Nileidae indet.
Nileidae indet. Angelin 1854 trilobite
"Nileid"
 Corynexochida - Illaenidae
Illaenus sp.
Illaenus sp. Dalman 1827 trilobite
Ostracoda
 Leperditicopida - Leperditiidae
Leperditiidae indet.
Leperditiidae indet. Jones 1856 ostracod
"Leperditiid"
Rhynchonellata
 Orthida - Anomalorthidae
Anomalorthis nevadensis
Anomalorthis nevadensis Ulrich and Cooper 1938