Fort Atkinson Limestone Echinoderms, Upper Mississippi Valley (Illinois, Iowa): Maysvillian, Illinois, Iowa
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Maquoketacrinus ornatus
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Edrioasteroidea
- Edrioblastoida
- Steganoblastidae
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Astrocystites aff. ottawaensis
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Cyclocystoidea
- Cyclocystoididae
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Cyclocystoides sp.
Salter and Billings 1858
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Soluta
- Syringocrinida
- Iowacystidae
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Iowacystis sagittaria
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Crinoidea
- Cupulocrinidae
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Cupulocrinus aff. latibrachiatus
(Billings 1857)
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| original and current combination Dendrocrinus latibrachiatus | ||||||||||
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Crinoidea
- Taxocrinida
- Taxocrinidae
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Protaxocrinus sp.
Springer 1906
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Crinoidea
- Porocrinida
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Carabocrinus slocomi
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Porocrinus fayettensis
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Crinoidea
- Plicodendrocrinidae
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Dendrocrinus casei
Meek 1871
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| recombined as Plicodendrocrinus casei | ||||||||||
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Crinoidea
- Dendrocrinida
- Dendrocrinidae
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Dendrocrinus oswegoensis
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Crinoidea
- Myelodactylida
- Iocrinidae
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Iocrinus sp.
Hall 1866
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Crinoidea
- Calceocrinida
- Calceocrinidae
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Calceocrinus levorsoni
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Crinoidea
- Homocrinida
- Homocrinidae
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Ectenocrinus raymondi
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Sygcaulocrinus typus
Ulrich 1925
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Crinoidea
- Diplobathrida
- Rhodocrinitidae
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Archaeocrinus obconicus
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aff. Trichinocrinus sp.
Moore and Laudon 1943
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| new genus aff. Trichinocrinus sp. | ||||||||||
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Echinoidea
- Bothriocidaroida
- Bothriocidaridae
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Bothriocidaris maquoketensis
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Illinois, Iowa |
| Coordinates: | 42.0° North, 93.5° West (view map) | ||
| Paleocoordinates: | 19.4° South, 63.5° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | basin |
Time
| Period: | Ordovician | Epoch: | Late/Upper Ordovician |
| Stage: | Katian | 10 m.y. bin: | Ordovician 5 |
| *Period: | Late/Upper Ordovician | *Local age/stage: | Maysvillian |
| Key time interval: | Maysvillian | ||
| Age range of interval: | 450.40000 - 449.80000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Maquoketa | Formation: | Fort Atkinson Limestone |
| Stratigraphic resolution: | formation |
Lithology and environment
| Primary lithology: | dolomitic argillaceous "limestone" |
| Includes fossils? | Y |
| Lithology description: 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
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 23524 | ||
| Authorizer: | S. Holland | Enterer: | T. Hanson |
| Modifier: | T. Hanson | Research group: | marine invertebrate |
| Created: | 2002-07-16 09:17:57 | Last modified: | 2002-07-16 12:18:01 |
| Access level: | the public | Released: | 2002-07-16 09:17:57 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 6707. | D. R. Kolata, J. C. Brower, and T. J. Frest. 1987. Upper Mississippi Valley Champlainian and Cincinnatian echinoderms. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 179-181 [S. Holland/T. Hanson/T. Hanson] |