D1604 CO (Ordovician of the United States)

Also known as SF 113

Where: Nye County, Nevada (39.0° N, 116.6° W: paleocoordinates 5.5° S, 81.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: L? trilobite zone, Antelope Valley Formation (Pogonip Group), Rangerian (470.0 - 470.3 Ma)

• Whiterockian; no formal stage

• bed-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified limestone

• middle shelf
• thin-bedded; muddy; silty, slabby bedding, tan-weathering

Size class: macrofossils

Preservation: replaced with silica

Collected by J. Ross, Jr.

Collection methods: bulk,

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 104459: 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
  -
Trilobita indet.
Trilobita indet. Walch 1771 trilobite
"Trilobite"
Cephalopoda
 Oncocerida - Graciloceratidae
Leonardoceras parvum
 Orthocerida - Baltoceratidae
"Bactroceras wilsoni" = Bactroceras angustisiphonatum
"Bactroceras wilsoni" = Bactroceras angustisiphonatum Rüdiger 1891
 Orthocerida - Orthoceratidae
Michelinoceras wilsoni
Gastropoda
 Euomphalina - Helicotomidae
? Helicotoma sp.
? Helicotoma sp. Salter 1859 snail
 Euomphalina - Macluritidae
Macluritidae indet.
Macluritidae indet. Carpenter 1861 snail
"macluritid"
 Murchisoniina - Trochonematidae
? Trochonema sp.
? Trochonema sp. Salter 1859 snail
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
"Bryozoan"