USGS M166, Fossil Hill (Triassic of the United States)

Where: Nevada (40.3° N, 118.1° W: paleocoordinates 11.2° N, 42.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: meeki ammonoid zone, Fossil Hill Member (Prida Formation), Illyrian (247.2 - 242.0 Ma)

• Frechites nevadanus beds. 163 ft (50 m) above base of section, meeki zone.

• bed-level stratigraphic resolution

Environment/lithology: basinal (); lithified, lenticular, gray limestone and lithified siliciclastic

• (p. 3) the Fossil Hill Member, which is dark-gray, commonly fossiliferous, lenticular limestone interbedded with calcareous mudstone, siltstone, and shale.

Size class: macrofossils

Collected by N.J. Silberling in 1956-1965; reposited in the USNM

Collection methods: surface (in situ),

Primary reference: N. J. Silberling and K. M. Nichols. 1982. Middle Triassic Molluscan Fossils of Biostratigraphic Significance from the Humboldt Range, Northwestern Nevada. Geological Survey Professional Paper 1207 [A. McGowan/A. McGowan/A. McGowan]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40751: authorized by Alistair McGowan, entered by Alistair McGowan on 30.06.2004, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Aulacoceratida - Xiphoteuthididae
Atractites solidus Smith 1914 belemnite
 Ceratitida - Proteusitidae
Tropigastrites louderbacki Hyatt and Smith 1905 ceratite
 Ceratitida - Beyrichitidae
Frechites nevadanus Mojsisovics 1888 ceratite
100+
 Ceratitida - Ceratitidae
Eutomoceras dunni Smith 1904 ceratite