D 725 CO (Ordovician of the United States)

Also known as SF 160

Where: Nye County, Nevada (37.1° N, 116.5° W: paleocoordinates 5.4° S, 85.2° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: J trilobite zone, Paiute Ridge Member (Antelope Valley Limestone Formation), Blackhillsian (478.6 - 471.8 Ma)

• Ibexian; Lower part of member

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified limestone

• carbonate platform
• medium-bedded

Size class: macrofossils

Preservation: replaced with silica

Collected by J. Ross, Jr.

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 104301: authorized by Seth Finnegan, entered by Seth Finnegan on 07.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

 Proetida - Bathyuridae
"? Goniotelina sp." = Acidiphorus
"? Goniotelina sp." = Acidiphorus Raymond 1925 trilobite
 Asaphida - Asaphidae
? Megalaspidella sp. Kobayashi 1937 trilobite
Lachnostoma latucelsum Ross 1951 trilobite
Ptyocephalus sp. Agassiz 1843 trilobite
 Orthida - Hesperonomiidae
 Orthida - Finkelnburgiidae