Sardeson Collection, Scales Shale, Clermont Member, Illinois and Iowa: Maysvillian, Illinois, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Lingulata - Lingulida - Discinidae
Orbiculoidea pelopea
Strophomenata - Strophomenida - Sowerbyellidae
Eoplectodonta recedens (Sardeson 1892)
recombined as Thaerodonta recedens
Strophomenata - Strophomenida - Furcitellidae
Megamyonia unicostata (Meek and Worthen 1868)
Strophomenata - Strophomenida - Strophomenidae
Tetraphalerella planodorsata (Winchell and Schuchert 1892)
Strophomena trilobita (Owen 1852)
recombined as Strophomena trilobata
Strophomenata - Strophomenida - Rafinesquinidae
Rafinesquina trentonensis (Hall 1847)
Rafinesquina deltoidea (Conrad 1838)
Rhynchonellata - Atrypida - Anazygidae
Zygospira modesta (Hall 1847)
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Hypsiptycha anticostiensis (Billings 1862)
Lepidocyclus capax (Conrad 1842)
recombined as Hiscobeccus capax
Rhynchonellata - Orthida - Heterorthidae
? Eremotrema emacerata (Hall 1860)
recombined as Heterorthina emacerata
Rhynchonellata - Orthida - Dalmanellidae
? Onniella porrecta
Paucicrura corpulenta (Sardeson 1892)
Paucicrura rogata (Sardeson 1892)
Rhynchonellata - Orthida - Plaesiomyidae
Plaesiomys proavita (Winchell and Schuchert 1892)
Austinella kankakensis (McChesney 1861)
Rhynchonellata - Orthida - Glyptorthidae
Glyptorthis bellarugosa (Conrad 1843)
Rhynchonellata - Orthida - Plectorthidae
Hebertella occidentalis (Hall 1847)
Trilobita - Asaphida - Asaphidae
Isotelus susae (Whitfield 1882)
see common names

Geography
Country:United States State/province:Illinois, Iowa
Coordinates: 42.0° North, 90.5° West (view map)
Paleocoordinates:21.0° South, 61.8° 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:Scales Shale Member:Clermont
Stratigraphic resolution:member
Lithology and environment
Primary lithology:green "shale"
Includes fossils?Y
Lithology description: Shale, bluish-green. Lithology from 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
Metadata
Database number:23811
Authorizer:S. Holland Enterer:T. Hanson
Modifier:T. Hanson Research group:marine invertebrate
Created:2002-07-21 19:18:13 Last modified:2002-07-21 22:18:17
Access level:the public Released:2002-07-21 19:18:13
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]