D 1506 CO (Ordovician of the United States)

Also known as SF 673

Where: Nye County, Nevada (39.0° N, 116.6° W: paleocoordinates 6.3° S, 77.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Mohawkian (457.3 - 451.0 Ma)

• Mohawkian; no formal stage.

•Left Unnamed Formation in Ross 1970. (Given as Diana Ls in Kay and Crawford, 1964, but that is Silurian)

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified limestone

• middle shelf
• fine-grained; bioclastic GS beds; interbedded w/highly fossiliferous GS beds

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 104572: authorized by Seth Finnegan, entered by Seth Finnegan on 07.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Brachiopoda
  -
Brachiopoda indet. Cuvier 1805
"brachiopod"
Strophomenata
 Strophomenida - Rafinesquinidae
"Leptaena cf. ordovicica" = Leptaena (Leptaena) ordovicica
"Leptaena cf. ordovicica" = Leptaena (Leptaena) ordovicica Cooper 1956
Rhynchonellata
 Orthida - Dalmanellidae
? Paucicrura sp. Cooper 1956
 Atrypida - Anazygidae
? Zygospira sp. Hall 1862
Trilobita
 Proetida - Proetidae
Astroproetus sp. Begg 1939 trilobite
 Phacopida - Homalonotidae
Brongniartella sp. Reed 1918 trilobite
 Phacopida - Encrinuridae
Encrinuroides sp. Reed 1931 trilobite
Deuteropoda
  -
Ostracoda indet. Latreille 1802 ostracod
"small ostracode"
Ostracoda
 Podocopida - Bythocyprididae
Bythocypris sp. Brady 1880 ostracod
 Palaeocopida - Schmidtellidae
Schmidtella sp. Ulrich 1892 ostracod
"Shmidtella"; small
? Schmidtella sp. Ulrich 1892 ostracod
"Shmidtella"
 Palaeocopida - Bolliidae
Parenthatia sp. Kay 1940 ostracod