Where: Illinois, Iowa, Wisconsin (43.0° N, 91.0° W: paleocoordinates 20.1° S, 61.3° W)
• coordinate estimated from map
• basin-level geographic resolution
When: Clermont Member (Scales Shale Formation), Maysvillian (450.2 - 449.6 Ma)
• member-level stratigraphic resolution
Environment/lithology: green shale
• Environmental call by T. Hanson.
• 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.
Size class: macrofossils
Primary reference: 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]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 23784: authorized by Steven Holland, entered by Tori Hanson on 20.07.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
• Faunal list compiled from: 1. Whitfield's (1882) report in volume 4 of Chamberlin's Geology of Wisconsin 2. Clarke's (1897) report in volume III part 2 of Winchell's Final Reports of the Minnesota Geological and Natural History Survey 3. Bassler's Index 4. Individual articles (Foerste, Flower, etc.) 5. Treatise, Part K 6. Author's personal field data.
Show authors, comments, and common names
| Cephalopoda |
| Actinocerida - Ormoceratidae |
|
| Actinocerida - Armenoceratidae |
|
| Orthocerida - Dawsonoceratidae |
|
| Orthocerida - Kionoceratidae |
|
| Endocerida - Endoceratidae |
|
| Multiceratoidea - Apsidoceratidae |
|
| Ascocerida - Ascoceratidae |
|
| Ascocerida - Probillingsitidae |
|