Frenchman Mountain, radio tower roadcut (Carboniferous of the United States)

Where: Nevada (36.2° N, 115.0° W: paleocoordinates 2.3° N, 44.5° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Callville Formation, Yeadonian (318.1 - 314.6 Ma)

• Basal meter of the Callville Formation. Cancelloceras characterizes the upper portion of the Bilinguites-Cancelloceras Ammonoid Biozone (Nm2C2) of Ruzhencev and Bogoslovskaya (1978), which can be correlated with the highest portion of the Hale Formation (early Morrowan) in the southern midcontinent, United States (Manger and Saunders, 1980). In western Europe, Cancelloceras is essentially restricted to the Yeadonian Stage (G,), Namurian Series.

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, ooidal grainstone

• Oolitic, cortoid-rich grainstone

Size class: macrofossils

Reposited in the SUI

Primary reference: A. L. Titus. 1997. The first record of Cancelloceras (Early Pennsylvanian Ammonoidea) from southern Nevada: implications for timing of regional Mid-Carboniferous sea-level fluctuations. Journal of Paleontology 71:158-162 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 170865: authorized by Matthew Clapham, entered by Matthew Clapham on 27.06.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Goniatitida -
"Gastriocerataceae indet." = Gastrioceratoidea
"Gastriocerataceae indet." = Gastrioceratoidea Hyatt 1884 ammonite
 Goniatitida - Gastrioceratidae
Cancelloceras cf. elegans Ruzhentsev and Bogoslovskaya 1978 ammonite
 Goniatitida - Glaphyritidae
Syngastrioceras sp. Librovitch 1938 ammonite