Dunleith Formation, Rivoli Member Echinoderms, Upper Mississippi Valley: Shermanian, Iowa, Illinois

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Edrioasteroidea - Edrioasterida - Edrioasteridae
Crinoidea - Diplobathrida - Cleiocrinidae
Cleiocrinus sp. Billings 1857
Crinoidea - Diplobathrida - Dimerocrinitidae
Ptychocrinus sp. Wachsmuth and Springer 1885
Crinoidea - Monobathrida - Glyptocrinidae
Pycnocrinus sp. Miller 1883
Crinoidea - Dendrocrinida - Dendrocrinidae
unclassified
Dendrocrinid n. gen n. sp.
Crinoidea - Porocrinida
Carabocrinus sp. Billings 1857
Crinoidea - Cupulocrinidae
Crinoidea - Homocrinida - Homocrinidae
Crinoidea - Calceocrinida - Calceocrinidae
see common names

Geography
Country:United States State/province:Iowa, Illinois
Coordinates: 42.0° North, 90.5° West (view map)
Paleocoordinates:11.7° South, 115.3° West (Wright 2013)
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:Shermanian
Key time interval: Shermanian
Age range of interval: 457.3 - 449.6 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Galena Formation:Dunleith Member:Rivoli
Stratigraphic resolution:member
Lithology and environment
Primary lithology: "limestone"
Includes fossils?Y
Lithology description: Limestone, argillaceous streaked. 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:23474
Authorizer:S. Holland Enterer:T. Hanson
Modifier:S. Holland Research group:marine invertebrate
Created:2002-07-15 12:39:52 Last modified:2025-02-22 15:12:02
Access level:the public Released:2002-07-15 12:39:52
Creative Commons license:CC0
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]