Clermont: Richmondian, Iowa
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Rhombifera
- Pleurocystitidae
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Pleurocystites beckeri
Foerste 1924
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Iowa | County: | Winneshiek County |
| Coordinates: | 43.3° North, 91.9° West (view map) | ||||
| Paleocoordinates: | 18.8° South, 115.1° West (Wright 2013) | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | outcrop |
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: | grading lithified cherty/siliceous grainstone |
| Lithology description: Very fossiliferous, but whole fossils uncommon. The most common lithology is echinodermal grainstone and packstone in thin, somewhat rubbly beds to 3.7 cm in thickness. Locally there are interbedded chert lenses, some graded bedding, and winnowed debris piles. | |
| Environment: | shallow subtidal indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 197197 | ||
| Authorizer: | P. Wagner | Enterer: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2018-10-25 14:33:40 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2018-10-25 14:33:40 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 50167. | R. L. Parsley. 1970. Revision of the North American Pleurocystitidae (Rhombifera-Cystoidea). Bulletins of American Paleontology 58:135-213 [P. Wagner/P. Wagner] |