Decorah Shale Echinoderms, Upper Mississippi Valley: Rocklandian - Shermanian, Minnesota

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Grenprisa billingsi
Paleocrinus angulatus
Crinoidea - Reteocrinidae
Reteocrinus rocktonensis
Crinoidea - Diplobathrida - Rhodocrinitidae
Archaeocrinus sp. Wachsmuth and Springer 1881
Crinoidea - Monobathrida - Glyptocrinidae
Pycnocrinus gerki
Pycnocrinus multibrachialis
Pycnocrinus sardesoni
Periglyptocrinus spinuliferus
Glyptocrinus sp. Hall 1847
Glyptocrinus tridactylus
Crinoidea - Calceocrinida - Calceocrinidae
Cremacrinus punctatus
Cremacrinus guttenbergensis Kolata 1975
Crinoidea - Homocrinida - Cincinnaticrinidae
Isotomocrinus tenuis Billings 1857
Crinoidea - Cupulocrinidae
Cupulocrinus canaliculatus
Cupulocrinus jewetti
Cupulocrinus levorsoni
Cupulocrinus humilis (Billings 1857)
Crinoidea - Dendrocrinida - Dendrocrinidae
Dendrocrinus sp. Hall 1852
Crinoidea - Porocrinida
Carabocrinus dicyclicus
Carabocrinus magnificus
Porocrinus elegans
Porocrinus pentagonius
Rhombifera - Pleurocystitidae
Amecystis woodi Broadhead and Strimple 1975
Pleurocystites squamosus Billings 1874
Cyclocystoidea - Cyclocystoididae
Cyclocystoides sp. Salter and Billings 1858
Asteroidea - Hadrosida - Urasterellidae
Promopalaeaster wilsoni (Raymond 1912)
Stylophora - Mitrata
Willmanocystis denticulatus
Ateleocystites guttenbergensis
Edrioasteroidea - Hemicystitidae
Hemicystites curtus
Hemicystites paulianus
Edrioasteroidea - Isorophida - Agelacrinitidae
Agelacrinites sp. Vanuxem 1842
Edrioasteroidea - Pyrgocystidae
Pyrgocystis sardesoni Bather 1915
see common names

Geography
Country:United States State/province:Minnesota
Coordinates: 44.0° North, 92.0° West (view map)
Paleocoordinates:19.1° South, 62.9° West
Basis of coordinate:estimated from map
Geographic resolution:basin
Time
Period: Ordovician Epoch: Late Ordovician
10 m.y. bin: Ordovician 4-5
*Period:Middle Ordovician - Late/Upper Ordovician *Local age/stage:Rocklandian - Shermanian
Key time interval: Rocklandian - Shermanian
Age range of interval: 457 - 449.8 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Decorah Shale
Stratigraphic resolution:formation
Lithology and environment
Primary lithology:gray "shale"
Includes fossils?Y
Lithology description: "[G]reenish-gray to pale-olive fossiliferous shale or claystone with lenses and think beds of coquinoidal limestone and calcareous shale." Lithology from W. F. Rice. 1987. The systematics and biostratigraphy of the Brachiopoda of the Decorah Shale at St. Paul, Minnesota. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 :136-166.
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:23402
Authorizer:S. Holland Enterer:T. Hanson
Modifier:T. Hanson Research group:marine invertebrate
Created:2002-07-14 13:16:50 Last modified:2003-07-18 18:05:03
Access level:the public Released:2002-07-14 13:16:50
Creative Commons license:CC BY
Reference information

Primary reference:
6707. D. R. Kolata, J. C. Brower, and T. J. Frest. 1987. Upper Mississippi Valley Champlainian and Cincinnatian echinoderms. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 179-181 [S. Holland/T. Hanson/T. Hanson]