near Washburn (Ordovician of the United States)

Where: Grainger County, Tennessee (36.3° N, 83.6° W: paleocoordinates 29.6° S, 79.6° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Roubidoux Formation (Knox Group), Tremadocian (485.4 - 477.7 Ma)

• upper part of Knox dolomite

• formation-level stratigraphic resolution

Environment/lithology: dolomite

Size classes: macrofossils, mesofossils

Preservation: recrystallized, original aragonite

Primary reference: E. O. Ulrich, A. F. Foerste, and A.K. Miller. 1943. Ozarkian and Canadian cephalopods. Part II, Brevicones. Geological Society of America Special Papers 49:1-240 [P. Wagner/P. Wagner/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 189226: authorized by Björn Kröger, entered by Björn Kröger on 06.10.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Endocerida - Piloceratidae
Allopiloceras breve Ulrich et al. 1943