Stratton's Farm: Richmondian, Michigan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Strophomenata
- Strophomenida
- Rafinesquinidae
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Rafinesquina alternata
(Conrad 1838)
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| R. alternata varicosa and R. alternata noquettensis | ||||||||||
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= Rafinesquina varicosa
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Wilson 1946 | |||||||||
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Bivalvia
- Nuculanida
- Nuculanidae
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Clidophorus noquettensis
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Bivalvia
- Nuculanida
- Cucullellidae
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Clidophorus neglectus
Hall 1862
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| recombined as Nuculites neglectus | ||||||||||
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Ostracoda
- Hollinocopida
- Tetradellidae
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Tetradella regularis
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Trilobita
- Asaphida
- Asaphidae
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? Isotelus gigas
(Dekay 1824)
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| recombined as Asaphus gigas | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Michigan | County: | Delta |
| Coordinates: | 45.7° North, 87.0° West (view map) | ||||
| Paleocoordinates: | 19.5° South, 55.4° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Ordovician | Epoch: | Late/Upper Ordovician |
| Stage: | Katian | 10 m.y. bin: | Ordovician 5 |
| *Period: | Late/Upper Ordovician | *Epoch: | Ashgillian | *Local age/stage: | Richmondian |
| Key time interval: | Richmondian | Conodont zone: | Amorphognathus ordovicicus |
| Age range of interval: | 449.80000 - 446.00000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Stonington | Member: | Bay de Noc | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Richmond Formation, Stonington beds, Bay de Noc "member" of beds. | |||||
Lithology and environment
| Primary lithology: | gray argillaceous "limestone" |
| Includes fossils? | Y |
| Lithology description: Argillaceous limestone, massive-bedded, coarsely crystalline and hard. The color is dark gray on fresh surfaces, weathering to grayish-brown. At the southern end of the outcrop, the limestone changes to an alternation of thinly-bedded shale and argillaceous limestone. | |
| Environment: | carbonate indet. |
| Geology comments: Environmental call by T. Hanson. Paper suggests mouth of a river. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,microfossils |
Collection methods and comments
| Collection methods: | chemical,field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 26311 | ||
| Authorizer: | S. Holland, P. Wagner | Enterer: | T. Hanson, P. Wagner |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2002-10-11 21:48:39 | Last modified: | 2015-08-24 10:51:22 |
| Access level: | the public | Released: | 2002-10-11 21:48:39 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 7267. | R. C. Hussey. 1926. The Richmond Formation of Michigan. In E. S. McCartney (ed.), Michigan University Contributions from the Museum of Geology 2:113-188 [S. Holland/T. Hanson/S. Bruning] |
Secondary references:
| 62157 | A. E. Wilson. 1946. Brachiopoda of the Ottawa Formation of the Ottawa - St. Lawrence Lowland. Geological Survey of Canada Bulletin 8:1-149 [P. Wagner/P. Wagner] |