Oneota dolomite near Dresbach (Ordovician of the United States)

Where: Winona County, Minnesota (43.9° N, 91.3° W: paleocoordinates 20.9° S, 75.2° W)

• coordinate based on nearby landmark

When: Oneota Formation, Tremadocian (485.4 - 477.7 Ma)

Environment/lithology: shallow subtidal; dolomite

Size class: macrofossils

Preservation: cast, original aragonite

Primary reference: E. O. Ulrich, A. F. Foerste, A. K. Miller and W. M. Furnish. 1944. Ozarkian and Canadian cephalopods, longicones and summary. Geological Society of America Special Paper 58:1-226 [P. Wagner/P. Wagner/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 101766: authorized by Björn Kröger, entered by Björn Kröger on 02.01.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ellesmerocerida - Ellesmeroceratidae
Clarkoceras gracile Ulrich et al. 1943
Clarkoceras corniculum Sardeson 1896
Clarkoceras luthei Calvin 1892
Levisoceras curvatum Ulrich et al. 1943
Ellesmeroceras winonicum Sardeson 1896