Maquoketa Formation, Elgin Member Cephalopods, Minnesota: Edenian - Maysvillian, Minnesota

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Barrandeocerida - Barrandeoceratidae
Cephalopoda - Endocerida - Endoceratidae
Cephalopoda - Ascocerida - Probillingsitidae
Cephalopoda - Clinoceratidae
Cephalopoda - Oncocerida - Oncoceratidae
Cephalopoda - Apsidoceratidae
Cephalopoda - Dissidocerida - Geisonoceratidae
Cephalopoda - Actinocerida - Ormoceratidae
Cephalopoda - Actinocerida - Armenoceratidae
Cephalopoda - Orthocerida - Dawsonoceratidae
Cephalopoda - Orthocerida - Proteoceratidae
Isorthoceras sociale (Hall in Miller 1877)
Cephalopoda - Orthocerida - Kionoceratidae
Polygrammoceras sp. Foerste 1927
see common names

Geography
Country:United States State/province:Minnesota
Coordinates: 45.0° North, 93.0° West (view map)
Paleocoordinates:8.3° South, 114.5° West (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:basin
Time
Period: Ordovician Epoch: Late Ordovician
Stage: Katian 10 m.y. bin: Ordovician 5
*Period:Late/Upper Ordovician *Local age/stage:Edenian - Maysvillian
Key time interval: Edenian - Maysvillian
Age range of interval: 451 - 449.6 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Maquoketa Member:Elgin
Stratigraphic resolution:member
Lithology and environment
Primary lithology: "shale"
Secondary lithology: "limestone"
Includes fossils?Y
Includes fossils?Y
Lithology description: Shale interbedded with limestone; sometimes dolomitic. Lithology from F. M. Swain. 1987. Middle and Upper Ordovician Ostracoda of Minnesota and Iowa. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 :99-101. Edited by R. E. Sloan.
Environment:carbonate indet.
Geology comments: Environmental call by T. Hanson.
Taphonomy
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Taxonomic list comments: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.
Metadata
Database number:23741
Authorizer:S. Holland Enterer:T. Hanson
Modifier:T. Hanson Research group:marine invertebrate
Created:2002-07-19 10:14:03 Last modified:2025-02-22 15:12:02
Access level:the public Released:2002-07-19 10:14:03
Creative Commons license:CC0
Reference information

Primary reference:
6752. 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]