Stewartville Dolomite Cephalopods, Iowa and Minnesota (Ordovician of the United States)

Where: Iowa, Minnesota (43.5° N, 94.0° W: paleocoordinates 18.2° S, 62.6° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Stewartville Formation, Late/Upper Ordovician (458.4 - 443.8 Ma)

• formation-level stratigraphic resolution

Environment/lithology: dolomite

• Environmental call by T. Hanson.

Size class: macrofossils

Primary reference: A. K. Miller, W. Youngquist, and C. Collinson. 1954. Ordovician cephalopod fauna of Baffin Island. Geological Society of America Memoir 62:1-234 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 24169: authorized by Steven Holland, entered by Tori Hanson on 01.08.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Discosorida - Westonoceratidae
Westonoceras sp.
Westonoceras sp. Foerste 1924
 Multiceratoidea - Apsidoceratidae
Charactoceras sp.
Charactoceras sp. Foerste 1924
 Ascocerida - Probillingsitidae
Probillingsites sp.
Probillingsites sp. Foerste 1928
 Orthocerida - Proteoceratidae
Ephippiorthoceras sp.
Ephippiorthoceras sp. Foerste 1924
 Actinocerida - Gonioceratidae
Lambeoceras sp.
Lambeoceras sp. Foerste 1917
 Endocerida - Endoceratidae
Endoceras sp.
Endoceras sp. Hall 1847