USGS loc. D990-CO, Spotted Range (Ordovician of the United States)

Where: Clark County, Nevada (36.8° N, 115.8° W: paleocoordinates 7.1° S, 82.3° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Antelope Valley Formation (Pogonip Group), Whiterockian (470.0 - 457.3 Ma)

• Porterfieldian was the upper bound for some reason:

• bed-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified, fine-grained, gray, silty limestone

• middle shelf
• bioclastic; “ghost” fossils

Size class: macrofossils

Preservation: replaced with silica

Collected by J. Ross, Jr.; reposited in the USGS

Collection methods: bulk,

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 226715: authorized by Jonathan Marcot, entered by Jonathan Marcot on 21.07.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Deuteropoda
  -
Ostracoda indet.
Ostracoda indet. Latreille 1802 ostracod
"ostracodes"
Trilobita
 Proetida - Bathyuridae
"? Goniotelina cf. williamsi" = Acidiphorus williamsi
"? Goniotelina cf. williamsi" = Acidiphorus williamsi Ross 1951 trilobite
 Asaphida - Asaphidae
? Isotelus sp.
? Isotelus sp. Dekay 1824 trilobite
 Phacopida - Pterygometopidae
Calliops aff. troosti
Calliops aff. troosti Safford and Vogdes 1889 trilobite
 Phacopida - Cheiruridae
? Ceraurinella sp.
? Ceraurinella sp. Cooper 1953 trilobite
Conodonta
 Conodonta -
Conodonta indet.
Conodonta indet. conodont
"Conodonts"