Mifflin Formation Cephalopods, Illinois, Iowa, Wisconsin: Blackriveran, Illinois, Iowa, Wisconsin

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Barrandeocerida - Plectoceratidae
Plectoceras robertsoni
Plectoceras occidentale
Cephalopoda - Barrandeocerida - Barrandeoceratidae
Centrocyrtoceras annulatum
Centrocyrtoceras duplicostatum
? Antiplectoceras sp. Foerste and Savage 1927
Cephalopoda - Endocerida - Endoceratidae
Endoceras sp. Hall 1847
Endoceras proteiforme Hall 1847
Endoceras cf. annulatum Hall 1847
recombined as Cyclendoceras annulatum
Cephalopoda - Actinocerida - Gonioceratidae
Gonioceras occidentale
Cephalopoda - Actinocerida - Actinoceratidae
Actinoceras bigsbyi
Actinoceras beloitense
Actinoceras janesvillensis
Actinoceras gravicentrum
Cephalopoda - Actinocerida - Ormoceratidae
Deiroceras scofieldi
Cephalopoda - Orthocerida - Tripteroceratidae
Tripteroceras planoconvexum
Tripteroceras scofieldi
Allumettoceras planodorsatum
Cephalopoda - Orthocerida - Proteoceratidae
Gorbyoceras sp. Shimizu and Obata 1935
Orthoceras junceum Hall 1847
recombined as Isorthoceras junceum
"Orthoceras" junceum
Cephalopoda - Orthocerida - Dawsonoceratidae
Metaspyroceras minneapolis
? Metaspyroceras nicolleti
Cephalopoda - Orthocerida - Orthoceratidae
Michelinoceras multicameratum
Michelinoceras sp. Foerste 1932
Cephalopoda - Dissidocerida - Geisonoceratidae
Geisonoceras scofieldi
Cephalopoda - Oncocerida - Diestoceratidae
Diestoceras sp. Foerste 1924
Cephalopoda - Oncocerida - Oncoceratidae
Cyrtorizoceras minneapolis (Clarke 1897)
original and current combination Cyrtoceras minneapolis
Loganoceras sp. Foerste 1932
Kentlandoceras husseyi
Kentlandoceras cf. schrocki
Zittelloceras beloitense
Zittelloceras percurvatum
? Zittelloceras brevicurvatum
? Zittelloceras tenuistriatum
Beloitoceras lycum
Beloitoceras janesvillense
Beloitoceras carveri
Beloitoceras pandion (Hall 1861)
Beloitoceras cf. huronense (Billings 1865)
Cephalopoda - Oncocerida - Valcouroceratidae
? Fayettoceras beloitense
Staufferoceras featherstonhaughi
Cephalopoda - Ascocerida - Probillingsitidae
? Redpathoceras sp. Flower 1963
Cephalopoda - Ascocerida - Hebetoceratidae
? Hebetoceras sp. Flower 1941
Cephalopoda - Apsidoceratidae
Chidleyenoceras sp. Shimizu and Obata 1935
Cephalopoda - Clinoceratidae
Whitfieldoceras mumiaforme
Whitfieldoceras clarkei
Cephalopoda - Discosorida - Westonoceratidae
Reedsoceras macrostomum
Cephalopoda - Discosorida - Cyrtogomphoceratidae
Ulrichoceras beloitense
Cephalopoda - Cyrtocerinida - Cyrtocerinidae
Cyrtocerina sp. Billings 1865
Cyrtocerina crenulata Flower 1952
Cephalopoda - Pseudorthocerida - Spyroceratidae
Spyroceras lesueuri
"Spyroceras" lesueuri
Spyroceras scofieldi
"Spyroceras" scofieldi
Spyroceras cylindratum Foerste 1932
see common names

Geography
Country:United States State/province:Illinois, Iowa, Wisconsin
Coordinates: 43.0° North, 91.0° West (view map)
Paleocoordinates:20.4° South, 63.1° West
Basis of coordinate:estimated from map
Geographic resolution:basin
Time
Period:Ordovician Epoch:Late/Upper Ordovician
10 m.y. bin:Ordovician 4-5
*Period:Middle Ordovician - Late/Upper Ordovician *Local age/stage:Blackriveran
Key time interval:Blackriveran
Age range of interval:457.00000 - 449.80000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Mifflin
Stratigraphic resolution:formation
Lithology and environment
Primary lithology: argillaceous "limestone"
Includes fossils?Y
Lithology description: "Thinly bedded argillaceous and shaly fossiliferous limestone." 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. 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:23753
Authorizer:S. Holland Enterer:T. Hanson
Modifier:S. Holland Research group:marine invertebrate
Created:2002-07-19 11:28:50 Last modified:2004-10-22 11:30:43
Access level:the public Released:2002-07-19 11:28:50
Creative Commons license:CC BY
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]