D1684 CO (Ordovician of the United States)

Also known as SF 617

Where: Lincoln County, Nevada (37.3° N, 115.4° W: paleocoordinates 6.2° S, 84.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: I? trilobite zone, Ninemile Formation, Blackhillsian (474.9 - 470.0 Ma)

• Ibexian; Blackhillsian

• bed-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified limestone

• middle shelf
• nodular; cherty; silty

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 104551: authorized by Seth Finnegan, entered by Seth Finnegan on 07.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

• Dasycladacean algae
Show authors, comments, and common names
Trilobita
 Odontopleurida - Odontopleuridae
? Diacanthaspis sp.
? Diacanthaspis sp. Whittington 1941 trilobite
 Proetida - Bathyuridae
? Bolbocephalus sp.
? Bolbocephalus sp. Whitfield 1890 trilobite
 Proetida - Hystricuridae
Psalikilus pikum
Psalikilus pikum Hintze 1953 trilobite
 Asaphida - Asaphidae
? Isoteloides sp., Trigonocerca typica
? Isoteloides sp. Raymond 1910 trilobite
Trigonocerca typica Ross 1951 trilobite
Rhynchonellata
 Orthida - Finkelnburgiidae
Diparelasma sp.
Diparelasma sp. Ulrich and Cooper 1936