Dendrocrinus-Dimerocrinites Assoc., Upper Rochester Shale, Thorold, Ont.: Wenlock, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Periechiocrinus sp.
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Crinoidea
- Dendrocrinida
- Dendrocrinidae
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Dendrocrinus spp.
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| 2 species | ||||||||||
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Crinoidea
- Diplobathrida
- Dimerocrinitidae
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Dimerocrinites sp.
Phillips 1839
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Crinoidea
- Monobathrida
- Melocrinitidae
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Alisocrinus sp.
Kirk 1929
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Rhynchonellata
- Rhynchonellida
- Rhynchotrematidae
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Stegerhynchus sp.
(Foerste 1909)
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| original and current combination Rhynchonella (Stegerhynchus) | ||||||||||
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Strophomenata
- Strophomenida
- Amphistrophiidae
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Amphistrophia sp.
Hall and Clarke 1892
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Strophomenata
- Orthotetida
- Chilidiopsidae
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Coolinia sp.
Bancroft 1949
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| spelled with current rank as Fardenia (Coolinia) | ||||||||||
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Bivalvia
- Ostreida
- Pterineidae
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Cornellites sp.
Williams 1908
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Trilobita
- Phacopida
- Dalmanitidae
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Dalmanites limulurus
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Trilobita
- Phacopida
- Homalonotidae
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Trimerus delphinocephalus
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| see common names | ||||||||||
Geography
| Country: | Canada | State/province: | Ontario |
| Coordinates: | 43.1° North, 79.2° West (view map) | ||
| Paleocoordinates: | 26.9° South, 44.9° West | ||
| Basis of coordinate: | based on political unit | ||
| Geographic resolution: | local area |
Time
| Period: | Silurian | Epoch: | Wenlock |
| 10 m.y. bin: | Silurian 2 | ||
| Key time interval: | Wenlock | ||
| Age range of interval: | 433.40000 - 427.40000 m.y. ago |
Stratigraphy
| Formation: | Rochester Shale | Member: | Burleigh Hill | ||
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: Upper Rochester Shale, uppermost Burleigh Hill Member, transitional into DeCew Dolostone. | |||||
Lithology and environment
| Primary lithology: | gray silty,calcareous mudstone | ||
| Secondary lithology: | "cross stratification" grainstone | ||
| Lithology description: "Associated lithologies are either sparsely fossiliferous, calcareous, medium gray silty mudstone or laminated to cross-laminated calcisiltite." | |||
| Environment: | offshore | Tectonic setting: | foreland basin |
| Glacial or sequence phase: | highstand systems tract | ||
| Geology comments: Excellent preservatio nof crinoids. Some assemblages in lenses that are interpreted as scour channel fillings. "relatively shallow, below wave base, muddy to silty sea floors that experienced episodic disturbance by storm-generated currents...BA 3-4 position is likely"
2003:04:06 SEP environmental/tectonic/sequence calls based on field knowledge familiarity with stratigraphic context. | |||
Taphonomy
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Database number: | 26687 | ||
| Authorizer: | M. Foote | Enterer: | M. Foote |
| Modifier: | S. Peters | Research group: | marine invertebrate |
| Created: | 2002-10-24 07:48:00 | Last modified: | 2003-04-06 17:11:11 |
| Access level: | the public | Released: | 2002-10-24 07:48:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 4379. | T. J. Frest, C. E. Brett, and B. J. Witzke. 1999. Caradocian-Gedinnian echinoderm associations of Central and Eastern North America. Paleocommunities--a case study from the Silurian and Lower Devonian 638-783 [M. Foote/K. Koverman/P. Wagner] |