Guttenberg Formation Cephalopods, Illinois, Iowa, Wisconsin (Ordovician to of the United States)

Where: Illinois, Iowa, Wisconsin (43.0° N, 91.0° W: paleocoordinates 20.4° S, 63.1° W)

• coordinate estimated from map

• basin-level geographic resolution

When: Guttenberg Formation (Galena Group), Rocklandian to Rocklandian (457.3 - 449.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: gray limestone and carbonaceous shale

• Environmental call by T. Hanson.
• "Gray lithographic limestone interbedded with carbonaceous shale." Lithology from O. L. Karklins. 1987. Bryozoa from Rocklandian (Middle Ordovician) rocks of the Upper Mississippi Valley region. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 :173-176. R. E. Sloan, ed.

Size class: macrofossils

Primary reference: J. A. Catalani. 1987. Biostratigraphy of the Middle and Late Ordovician cephalopods of the Upper Mississippi Valley area. In R. E. Sloan (ed.), Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 187-189 [S. Holland/T. Hanson/S. Bruning]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 23762: authorized by Steven Holland, entered by Tori Hanson on 19.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• Faunal list compiled from: 1. Whitfield's (1882) report in volume 4 of Chamberlin's Geology of Wisconsin 2. Clarke's (1897) report in volume III part 2 of Winchell's Final Reports of the Minnesota Geological and Natural History Survey 3. Bassler's Index 4. Individual articles (Foerste, Flower, etc.) 5. Treatise, Part K 6. Author's personal field data.
Show authors, comments, and common names
Cephalopoda
 Oncocerida - Oncoceratidae
? Scofieldoceras depressum
 Oncocerida - Valcouroceratidae
? Manitoulinoceras warsawense
 Orthocerida - Orthoceratidae
Michelinoceras multicameratum, Michelinoceras sp.
Michelinoceras sp. Foerste 1932
 Orthocerida - Proteoceratidae
"Orthoceras junceum" = Isorthoceras junceum
"Orthoceras junceum" = Isorthoceras junceum Hall 1877
"Orthoceras" junceum
 Orthocerida - Dawsonoceratidae
Metaspyroceras perlineatum, Metaspyroceras clarkei, Anaspyroceras anellus
 Actinocerida - Gonioceratidae
Gonioceras kayi
 Endocerida - Endoceratidae
Endoceras decorahense, Endoceras proteiforme, Nanno aulema