Robinson Summit, Unit 2 (Permian of the United States)

Where: White Pine County, Nevada (39.5° N, 115.1° W: paleocoordinates 14.1° N, 36.3° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Loray Formation, Kungurian (279.3 - 272.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; sandy limestone and limestone

Size class: macrofossils

Preservation: replaced with silica

Primary reference: T. V. Mayou. 1967. Paleontology of the Permian Loray Formation in White Pine County, Nevada. Brigham Young University Research Studies, Geology Series 14:101-122 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 38825: authorized by David Bottjer, entered by Matthew Clapham on 06.05.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Ostracodes abundant, crinoid ossicles rare, echinoid fragments rare
Bivalvia
 Ostreida - Pinnidae
"Aviculopinna sagitta" = Meekopinna sagitta
"Aviculopinna sagitta" = Meekopinna sagitta Chronic 1952 oyster
Gastropoda
 Bellerophontida - Euphemitidae
"Euphemites crenulates" = Euphemites crenulatus
"Euphemites crenulates" = Euphemites crenulatus Yochelson 1960 snail
Stenolaemata
 Fenestrida - Fenestellidae
Fenestella sp. Lonsdale 1839
 Trepostomida - Stenoporidae