Where: Illinois, Iowa, Wisconsin (43.0° N, 91.0° W: paleocoordinates 20.4° S, 63.1° W)
• coordinate estimated from map
• basin-level geographic resolution
When: Quimbys Mill Formation, Blackriveran (457.3 - 449.6 Ma)
• formation-level stratigraphic resolution
Environment/lithology: limestone
• Environmental call by T. Hanson.
• "12 to 14 feet thick . . . medium to thin beds of limestone and dolomite separated by thin shale laminae." Lithology from O. L. Karklins. 1987. Bryozoa from Rocklandian (Middle Ordovician) rocks of the Upper Mississippi Valley region. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 :173-176, R.E. Sloan, ed.
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 23758: authorized by Steven Holland, entered by Tori Hanson on 19.07.2002
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
| unclassified |
| - |
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| Cephalopoda |
| Barrandeocerida - Barrandeoceratidae |
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| Barrandeocerida - Plectoceratidae |
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| Oncocerida - Valcouroceratidae |
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| Oncocerida - Oncoceratidae |
Scofieldoceras shumardi, Beloitoceras lycum, Beloitoceras janesvillense, Beloitoceras carveri, Beloitoceras norwoodi, Beloitoceras houghtoni, Beloitoceras plebeium, Beloitoceras cf. huronense, Beloitoceras pandion, Cyrtorizoceras minneapolis, Oncoceras abruptum, Oncoceras tetreauvillense, Kentlandoceras husseyi, ? Zittelloceras brevicurvatum, Zittelloceras beloitense, Zittelloceras clarkeanum, Zittelloceras scofieldi, Zittelloceras percurvatum, ? Zittelloceras tenuistriatum, Richardsonoceras simplex, Richardsonoceras beloitense, Richardsonoceras romingeri, ? Richardsonoceras clarkei, ? Richardsonoceras scofieldi, Loganoceras sp.
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| Oncocerida - Diestoceratidae |
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| Multiceratoidea - Clinoceratidae |
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| Ascocerida - Probillingsitidae |
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| Ascocerida - Hebetoceratidae |
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| Discosorida - Westonoceratidae |
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| Multiceratoidea - Apsidoceratidae |
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| Orthocerida - Dawsonoceratidae |
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| Orthocerida - Tripteroceratidae |
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| Orthocerida - Proteoceratidae |
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| Orthocerida - Orthoceratidae |
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| Actinocerida - Actinoceratidae |
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| Actinocerida - Gonioceratidae |
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| Pseudorthocerida - Spyroceratidae |
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| Endocerida - Endoceratidae |
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