Ion Formation, St. James Member Cephalopods, Illinois, Iowa, Wisconsin: Kirkfieldian, Illinois, Iowa, Wisconsin
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Cyrtocerinida
- Cyrtocerinidae
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Cyrtocerina schoolcrafti
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Cephalopoda
- Oncocerida
- Valcouroceratidae
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? Manitoulinoceras wykoffense
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Cephalopoda
- Barrandeocerida
- Barrandeoceratidae
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Centrocyrtoceras rotundum
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Cephalopoda
- Orthocerida
- Proteoceratidae
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Orthoceras junceum
Hall 1847
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| recombined as Isorthoceras junceum | ||||||||||
| "Orthoceras" junceum | ||||||||||
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Cephalopoda
- Orthocerida
- Orthoceratidae
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Orthoceras beltrami
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| "Orthoceras" beltrami | ||||||||||
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Michelinoceras sp.
Foerste 1932
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Illinois, Iowa, Wisconsin |
| Coordinates: | 43.0° North, 91.0° West (view map) | ||
| Paleocoordinates: | 20.4° South, 63.1° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | basin |
Time
| Period: | Ordovician | Epoch: | Late/Upper Ordovician |
| 10 m.y. bin: | Ordovician 4-5 | ||
| *Period: | Middle Ordovician - Late/Upper Ordovician | *Local age/stage: | Kirkfieldian |
| Key time interval: | Kirkfieldian | ||
| Age range of interval: | 457.00000 - 449.80000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Lithology and environment
| Primary lithology: | "shale" |
| Includes fossils? | Y |
| Lithology description: Lithology from F. M. Swain. 1987. Middle and Upper Ordovician Ostracoda of Minnesota and Iowa. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 :99-101, R. E. Sloan, ed. | |
| 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 |
| Taxonomic list comments: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. | |
Metadata
| Database number: | 23767 | ||
| Authorizer: | S. Holland | Enterer: | T. Hanson |
| Modifier: | S. Holland | Research group: | marine invertebrate |
| Created: | 2002-07-19 14:09:16 | Last modified: | 2004-10-22 12:05:04 |
| Access level: | the public | Released: | 2002-07-19 14:09:16 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 6752. | 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] |