Kankakee River: Richmondian, Illinois
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Rhynchonellata
- Orthida
- Plaesiomyidae
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Illinois |
| Coordinates: | 41.1° North, 87.9° West (view map) | ||
| Paleocoordinates: | 22.2° South, 113.7° West (Wright 2013) | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | basin |
Time
| Period: | Ordovician | Epoch: | Late Ordovician |
| Stage: | Katian | 10 m.y. bin: | Ordovician 5 |
| Key time interval: | Richmondian | ||
| Age range of interval: | 449.6 - 445.5 m.y. ago |
Stratigraphy
| Geological group: | Maquoketa | Formation: | Fort Atkinson |
| Stratigraphic resolution: | formation |
Lithology and environment
| Primary lithology: | dolomite |
| Lithology description: The Fort Atkinson is a very crystalline, rough-textured, speckled, brownish red to light gray dolomite. | |
| Environment: | carbonate indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Taxonomic list comments:Elias 1982 | |
Metadata
| Database number: | 192093 | ||
| Authorizer: | P. Wagner | Enterer: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2018-03-08 12:10:56 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2018-03-08 12:10:56 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 52181. | Y. Wang. 1949. Maquoketa Brachiopoda of Iowa. Geological Society of America Memoir 42:1-55 [P. Wagner/P. Wagner] |