Maquoketa Group, Fort Atkinson Fm, northeastern Iowa-northwestern Illinois: Richmondian, Iowa, Illinois
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Anthozoa
- Stauriida
- Streptelasmatidae
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Bighornia cf. patella
(Wilson 1926)
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Iowa, Illinois |
| Coordinates: | 43.3° North, 90.2° West (view map) | ||
| Paleocoordinates: | 19.5° South, 114.0° West (Wright 2013) | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | local area |
Time
| Period: | Ordovician | Epoch: | Late Ordovician |
| Stage: | Katian | 10 m.y. bin: | Ordovician 5 |
| *Period: | Late/Upper Ordovician | *Local age/stage: | Richmondian |
| Key time interval: | Richmondian | ||
| Age range of interval: | 449.6 - 445.5 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Maquoketa | Formation: | Fort Atkinson |
| Stratigraphic resolution: | formation |
Lithology and environment
| Environment: | carbonate indet. |
Taphonomy
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Taxonomic list comments:Elias 1982 | |
Metadata
| Database number: | 28166 | ||
| Authorizer: | S. Holland | Enterer: | T. Hanson |
| Modifier: | T. Hanson | Research group: | marine invertebrate |
| Created: | 2003-01-26 23:42:30 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2003-01-26 23:42:30 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 7399. | R. J. Elias. 1983. Late Ordovician solitary rugose corals of the Stony Mountain Formation, southern Manitoba, and its equivalents. Journal of Paleontology 57(5):924-956 [S. Holland/T. Hanson/P. Wagner] |