Dunleith Formation, Sherwood Member Cephalopods, Illinois, Iowa, Wisconsin: Shermanian, Illinois, Iowa, Wisconsin

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Endocerida - Endoceratidae
Cameroceras hennepini
Cephalopoda - Orthocerida - Dawsonoceratidae
? Metaspyroceras wisconsinense
Cephalopoda - Orthocerida - Orthoceratidae
Orthoceras beltrami
"Orthoceras" beltrami
Michelinoceras multicameratum
Michelinoceras sp. Foerste 1932
Cephalopoda - Orthocerida - Kionoceratidae
Polygrammoceras prestonense
Kionoceras decorahense Flower 1952
Cephalopoda - Orthocerida - Proteoceratidae
Orthoceras junceum Hall 1847
recombined as Isorthoceras junceum
"Orthoceras" junceum
Cephalopoda - Orthocerida - Tripteroceratidae
Tripteroceras planoconvexum
Cephalopoda - Barrandeocerida - Barrandeoceratidae
Centrocyrtoceras rotundum
Cephalopoda - Oncocerida - Valcouroceratidae
? Manitoulinoceras wykoffense
Cephalopoda - Oncocerida - Diestoceratidae
Diestoceras clarkei
Cephalopoda - Oncocerida - Oncoceratidae
Oncoceras douglassi
Cephalopoda - Discosorida - Westonoceratidae
Teichertoceras cf. husseyi
Westonoceras minnesotense
Cephalopoda - Ascocerida - Probillingsitidae
Probillingsites milleri
Probillingsites welleri Foerste 1928
Cephalopoda - Clinoceratidae
Whitfieldoceras minimum
Whitfieldoceras cf. exiguum
Cephalopoda - Cyrtocerinida - Cyrtocerinidae
Cyrtocerina schoolcrafti
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
*Period:Middle Ordovician - Late/Upper Ordovician *Local age/stage:Shermanian
Key time interval:Shermanian
Age range of interval:460.90000 - 449.50000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Galena Formation:Dunleith Member:Sherwood
Stratigraphic resolution:member
Lithology and environment
Primary lithology: calcareous "limestone"
Includes fossils?Y
Lithology description: 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.
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:23775
Authorizer:S. Holland Enterer:T. Hanson
Modifier:S. Holland Research group:marine invertebrate
Created:2002-07-19 15:38:25 Last modified:2004-10-22 12:56:18
Access level:the public Released:2002-07-19 15:38:25
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]