Sardeson Collection, Prosser Limestone: Shermanian, Minnesota

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Lingulata - Lingulida - Pseudolingulidae
? Pseudolingula iowensis (Owen 1844)
Lingulata - Lingulida - Lingulasmatidae
Lingulasma galenensis
Lingulata - Lingulida - Obolidae
Palaeoglossa hurlburti
Lingulata - Lingulida - Discinidae
Orbiculoidea pelopea
Strophomenata - Strophomenida - Sowerbyellidae
Sowerbyella minnesotensis (Sardeson 1892)
Strophomenata - Strophomenida - Strophomenidae
Strophomena trilobita (Owen 1852)
recombined as Strophomena trilobata
Strophomenata - Strophomenida - Rafinesquinidae
Rafinesquina deltoidea (Conrad 1838)
Rhynchonellata - Pentamerida - Parastrophinidae
Parastrophia bernensis
replaced by Parastrophina
Rhynchonellata - Atrypida - Cyclospiridae
Cyclospira bisulcata (Emmons 1842)
Rhynchonellata - Atrypida - Anazygidae
Zygospira uphami
Zygospira recurvirostris (Hall 1847)
recombined as Anazyga recurvirostra
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Lepidocyclus capax (Conrad 1842)
recombined as Hiscobeccus capax
Rhynchonellata - Orthida - Dalmanellidae
Paucicrura rogata (Sardeson 1892)
Rhynchonellata - Orthida - Plaesiomyidae
Plaesiomys meedsi (Winchell and Schuchert 1892)
recombined as Dinorthis meedsi
Rhynchonellata - Orthida - Glyptorthidae
Glyptorthis bellarugosa (Conrad 1843)
Rhynchonellata - Orthida - Hesperorthidae
Hesperorthis tricenaria (Conrad 1843)
Trilobita - Corynexochida - Illaenidae
Illaenus sp. Dalman 1827
Bumastus orbicaudatus (Billings 1859)
Trilobita - Phacopida - Encrinuridae
Encrinuroides vigilans (Hall 1847)
recombined as Erratencrinurus vigilans
Trilobita - Phacopida - Cheiruridae
Ceraurus pleurexanthemus Green 1832
Trilobita - Asaphida - Asaphidae
Isotelus gigas (Dekay 1824)
recombined as Asaphus gigas
see common names

Geography
Country:United States State/province:Minnesota
Coordinates: 45.0° North, 93.3° West (view map)
Paleocoordinates:17.8° South, 62.8° West
Basis of coordinate:based on political unit
Geographic resolution:outcrop
Time
Period:Ordovician Epoch:Late/Upper Ordovician
10 m.y. bin:Ordovician 4-5
*Period:Middle Ordovician - Late/Upper Ordovician *Local age/stage:Shermanian
Key time interval:Shermanian
Age range of interval:457.00000 - 449.80000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Prosser Limestone Local bed:7, 8
Local order:bottom to top
Stratigraphic resolution:group of beds
Stratigraphy comments: Beds numbered by F. W. Sardeson.
Lithology and environment
Primary lithology: "limestone"
Includes fossils?Y
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:23279
Authorizer:S. Holland Enterer:T. Hanson
Modifier:S. Holland Research group:marine invertebrate
Created:2002-07-11 09:57:18 Last modified:2004-10-22 11:40:24
Access level:the public Released:2002-07-11 09:57:18
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]