Fort Atkinson Limestone Cephalopods, Illinois, Iowa, Wisconsin: Maysvillian, Illinois, Iowa, Wisconsin

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Ascocerida - Ascoceratidae
Schuchertoceras thomasi
Cephalopoda - Endocerida - Endoceratidae
Endoceras clermontense
? Endoceras fulgar
Cephalopoda - Orthocerida - Dawsonoceratidae
Anaspyroceras clermontense
see common names

Geography
Country:United States State/province:Illinois, Iowa, Wisconsin
Coordinates: 43.0° North, 91.0° West (view map)
Paleocoordinates:20.1° South, 61.3° West
Basis of coordinate:estimated from map
Geographic resolution:basin
Time
Period:Ordovician Epoch:Late/Upper Ordovician
Stage:Katian 10 m.y. bin:Ordovician 5
*Period:Late/Upper Ordovician *Local age/stage:Maysvillian
Key time interval:Maysvillian
Age range of interval:450.40000 - 449.80000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Maquoketa Formation:Fort Atkinson Limestone
Stratigraphic resolution:formation
Lithology and environment
Primary lithology:dolomitic argillaceous "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:23785
Authorizer:S. Holland Enterer:T. Hanson
Modifier:T. Hanson Research group:marine invertebrate
Created:2002-07-20 20:16:06 Last modified:2002-07-20 23:16:11
Access level:the public Released:2002-07-20 20:16:06
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]