Maquoketa Creek: Richmondian, Iowa
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Phacopida
- Calymenidae
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Calymene mammillata n. sp.
Hall 1861
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Iowa |
| Coordinates: | 42.5° North, 90.9° West (view map) | ||
| Paleocoordinates: | 19.9° South, 115.0° West (Wright 2013) | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Ordovician | Epoch: | Late Ordovician |
| Stage: | Katian | 10 m.y. bin: | Ordovician 5 |
| Key time interval: | Richmondian | Graptolite zone: | Amplexograptus manitoulinensis |
| Age range of interval: | 449.6 - 445.5 m.y. ago |
Stratigraphy
| Geological group: | Maquoketa | Formation: | Scales Shale | Member: | Elgin |
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: "Elgin Shaly Limestone Member" | |||||
Lithology and environment
| Primary lithology: | "limestone" |
| Includes fossils? | Y |
| Lithology description: Limestone, occasional shale partings. Lithology from C. O. Leverson, A. J. Gerk, R. E. Sloan, & L. A. Bisagno. General section of the Middle and Late Ordovician strata of Northeastern Iowa, Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35, p.25-39. Edited by R. E. Sloan. | |
| Environment: | carbonate indet. |
| Geology comments: Environmental call by T. Hanson. | |
Taphonomy
| Modes of preservation: | body |
| 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: | 192901 | ||
| Authorizer: | P. Wagner | Enterer: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2018-04-24 21:29:46 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2018-04-24 21:29:46 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 65495. | H. B. Whittington. 1971. A New Calymenid Trilobite from the Maquoketa Shale, Iowa. Smithsonian Contributions to Paleobiology 3:129-136 [P. Wagner/P. Wagner] |