Sardeson Collection, Maquoketa Formation, Clermont Member: Maysvillian, Minnesota

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Lingulata - Lingulida - Obolidae
Lingulops sp. Hall 1871
Lingulata - Lingulida - Discinidae
Orbiculoidea pelopea
Strophomenata - Strophomenida - Sowerbyellidae
Eoplectodonta saxea
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
Strophomena occidentalis (Foerste 1912)
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
Paucicrura corpulenta (Sardeson 1892)
Paucicrura rogata (Sardeson 1892)
Rhynchonellata - Orthida - Platyorthidae
Diceromyonia ignota
Rhynchonellata - Orthida - Plaesiomyidae
Plaesiomys subquadrata (Hall 1847)
recombined as Plaesiomys subquadratus
Plaesiomys proavita (Winchell and Schuchert 1892)
Austinella kankakensis (McChesney 1861)
Rhynchonellata - Orthida - Glyptorthidae
Glyptorthis insculpta (Hall 1847)
Glyptorthis bellarugosa (Conrad 1843)
Rhynchonellata - Orthida - Plectorthidae
Hebertella occidentalis (Hall 1847)
Trilobita - Phacopida - Calymenidae
Flexicalymene senaria (Conrad 1841)
recombined as Flexicalymene (Flexicalymene) senaria
Trilobita - Asaphida - Asaphidae
Isotelus susae (Whitfield 1882)
see common names

Geography
Country:United States State/province:Minnesota
Coordinates: 45.0° North, 93.3° West (view map)
Paleocoordinates:17.5° South, 61.1° West
Basis of coordinate:based on political unit
Geographic resolution:outcrop
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 Graptolite zone:
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
Stratigraphy comments: PJW: was given as Amplexograptus manitoulinensis zone, but the volume does not state this and Clermont is younger than that.
Lithology and environment
Primary lithology: "limestone"
Includes fossils?Y
Lithology description: Shaly limestone. 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.
Environment:carbonate indet.
Geology comments: Environmental call by T. Hanson
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:23283
Authorizer:S. Holland Enterer:T. Hanson
Modifier:P. Wagner Research group:marine invertebrate
Created:2002-07-11 11:08:21 Last modified:2018-09-06 12:13:04
Access level:the public Released:2002-07-11 11:08:21
Creative Commons license:CC BY
Reference information

Primary reference:
6686. W. F. Rice and E. P. Hedblom. 1987. Brachiopods and trilobites of the Sardeson Beds in the Twin Cities. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 131-135 [S. Holland/T. Hanson/T. Hanson]