PBDB Collection

Scales Shale, Elgin Member Cephalopods, Illinois, Iowa, Wisconsin (Ordovician to of the United States)

Where: Illinois, Iowa, Wisconsin (43.0° N, 91.0° W)

• Paleocoordinates: 10.7° S, 114.9° W (Wright 2013)

• coordinate estimated from map

• basin-level geographic resolution

When: Elgin Member (Scales Shale Formation), Edenian to Edenian (451.0 - 449.6 Ma)

• member-level stratigraphic resolution

Environment/lithology: limestone

• Environmental call by T. Hanson.

• Limestone, occasional shale partings. Lithology from C. O. Leverson, A. J. Gerk, R. E. Sloan, & L. A. Bisagno. General section of the Middle and Late Ordovician strata of Northeastern Iowa, Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35, p.25-39. Edited by R. E. Sloan.

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 23783: authorized by Steven Holland, entered by Tori Hanson on 20.07.2002

Creative Commons license: CC0 (CC0)

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
Ascocerida - Probillingsitidae	Probillingsites pronis Probillingsites pronis
Oncocerida - Oncoceratidae	Beloitoceras grafense, Beloitoceras whitneyi Beloitoceras grafense Beloitoceras whitneyi
Multiceratoidea - Apsidoceratidae	Deckeroceras clermontense, Charactoceras laddi Deckeroceras clermontense Charactoceras laddi
Endocerida - Endoceratidae	Endoceras atkinsonense, Endoceras clermontense, Endoceras kayi, Endoceras thomasi Endoceras atkinsonense Endoceras clermontense Endoceras kayi Endoceras thomasi
Actinocerida - Ormoceratidae	? Ormoceras maquoketense ? Ormoceras maquoketense
Actinocerida - Armenoceratidae	Armenoceras clermontense, Armenoceras iowense Armenoceras clermontense Armenoceras iowense
Orthocerida - Kionoceratidae	Kionoceras postvillense, Kionoceras tenuitectum, Kionoceras thomasi, Polygrammoceras sp. Kionoceras postvillense Kionoceras tenuitectum Kionoceras thomasi Polygrammoceras sp. Foerste 1927
Orthocerida - Dawsonoceratidae	Anaspyroceras calvini, Anaspyroceras clermontense, Anaspyroceras perroti Anaspyroceras calvini Anaspyroceras clermontense Anaspyroceras perroti
Orthocerida - Proteoceratidae	Isorthoceras sociale, Ephippiorthoceras laddi, Ephippiorthoceras tenuistriatum Isorthoceras sociale Hall in Miller 1877 Ephippiorthoceras laddi Ephippiorthoceras tenuistriatum
Dissidocerida - Geisonoceratidae	? Geisonoceras clermontense ? Geisonoceras clermontense