Decorah Shale Pelecypods, Minnesota: Rocklandian - Shermanian, Minnesota
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia
- Nuculida
- Praenuculidae
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Similodonta sp.
Soot-Ryen 1964
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Bivalvia
- Nuculida
- Cardiolariidae
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Deceptrix sp.
Fuchs 1919
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Bivalvia
- Solemyida
- Ctenodontidae
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Ctenodonta sp.
Salter 1852
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Tancrediopsis sp.
(Beushausen 1895)
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Bivalvia
- Nuculanida
- Malletiidae
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Palaeoneilo sp.
Hall and Whitfield 1869
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Bivalvia
- Modiomorphida
- Modiomorphidae
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Modiolopsis sp.
Hall 1847
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Aristerella sp.
Ulrich 1894
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Orthodesma sp.
Hall and Whitfield 1875
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Colpomya sp.
Ulrich 1893
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Modiolodon sp.
Ulrich 1894
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Bivalvia
- Megalodontida
- Plethocardiidae
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Plethocardia sp.
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Bivalvia
- Lyrodesmatidae
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Lyrodesma sp.
Conrad 1841
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Bivalvia
- Cyrtodontida
- Cyrtodontidae
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Cyrtodonta sp.
Billings 1858
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Cyrtodontula sp.
Tomlin 1931
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Vanuxemia sp.
Billings 1858
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see common names |
Geography
Country: | United States | State/province: | Minnesota |
Coordinates: | 44.5° North, 93.0° West (view map) | ||
Paleocoordinates: | 18.3° South, 63.0° West | ||
Basis of coordinate: | estimated from map | ||
Geographic resolution: | basin |
Time
Period: | Ordovician | Epoch: | Late Ordovician |
10 m.y. bin: | Ordovician 4-5 | ||
*Period: | Middle Ordovician - Late/Upper Ordovician | *Local age/stage: | Rocklandian - Shermanian |
Key time interval: | Rocklandian - Shermanian | ||
Age range of interval: | 457 - 449.8 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Geological group: | Galena | Formation: | Decorah Shale |
Stratigraphic resolution: | formation |
Lithology and environment
Primary lithology: | "shale" |
Includes fossils? | Y |
Lithology description: "[G]reenish-gray to pale-olive fossiliferous shale or claystone with lenses and think beds of coquinoidal limestone and calcareous shale." Lithology from W. F. Rice. 1987. The systematics and biostratigraphy of the Brachiopoda of the Decorah Shale at St. Paul, Minnesota. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 :136-166. 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 excludes: | species names |
Collection methods: | survey of museum collection |
Reason for describing collection: | biostratigraphic analysis |
Collection method comments: The fauna is not dominated in diversity by any one subclass of pelecypods. "Where possible, stratigraphic information is taken from museum labels; where this is not possible, it is taken from Bassler (1915)." |
Metadata
Database number: | 23550 | ||
Authorizer: | S. Holland | Enterer: | T. Hanson |
Modifier: | T. Hanson | Research group: | marine invertebrate |
Created: | 2002-07-16 14:34:53 | Last modified: | 2003-07-18 18:05:03 |
Access level: | the public | Released: | 2002-07-16 14:34:53 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
6733. | J., J.r. Pojeta. 1987. Ordovician pelecypods from the Upper Mississippi Valley. In R. E. Sloan (ed.), Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 182-182 [S. Holland/T. Hanson/P. Wagner] |