MacDonald River Section Unit 08 134-146 ft: Richmondian, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Tentaculitida
- Costatulitidae
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Cornulites richmondensis
(Miller 1874)
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| recombined as Costatulites richmondensis | ||||||||||
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Strophomenata
- Strophomenida
- Plectambonitidae
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Plectambonites sericeus
Sowerby 1839
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| Plectambonites sericeus glaber | ||||||||||
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Strophomenata
- Strophomenida
- Furcitellidae
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? Leptaena nitens
(Billings 1860)
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| recombined as Megamyonia nitens | ||||||||||
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Rhynchonellata
- Orthida
- Plaesiomyidae
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Dinorthis carletona
Twenhofel 1928
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| misspelling Dinorthis (Pionorthis) carletona | ||||||||||
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Rhynchonellata
- Orthida
- Dalmanellidae
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Dalmanella meeki
(Miller 1875)
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| recombined as Cincinnetina meeki | ||||||||||
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Stenolaemata
- Cryptostomata
- Arthrostylidae
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Sceptropora facula
Ulrich 1888
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Stenolaemata
- Cryptostomata
- Ptilodictyidae
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Ptilodictya flagella
(Nicholson 1875)
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Trilobita
- Phacopida
- Cheiruridae
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Ceraurinus icarus
(Billings 1860)
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| see common names | ||||||||||
Geography
| Country: | Canada | State/province: | Quebec | County: | Anticosti Island |
| Coordinates: | 49.7° North, 63.0° West (view map) | ||||
| Paleocoordinates: | 23.1° South, 38.1° 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 |
| Key time interval: | Richmondian | Other zone: | Hercochitina normalis |
| Age range of interval: | 449.80000 - 446.00000 m.y. ago |
Stratigraphy
| Geological group: | Anticosti | Formation: | Vauréal | Member: | Homard |
| Local section: | MacDonald River Section | Local bed: | 134-146 ft | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Given as English Head Zone 5.
The limestone beds range in thickness from 2 inches to 1 foot. Seaweed impressions are extremely common on some of the limestone beds. The "track bed" is somewhere near the top of this division, as pieces from it were found in the talus slope beneath, but it was not located in place | |||||
Lithology and environment
| Primary lithology: | blue "limestone" |
| Secondary lithology: | gray,blue "shale" |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: Hard, blue limestone separated by thin beds and partings of bluish grey shale. | |
| Environment: | carbonate indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Reason for describing collection: | general faunal/floral analysis |
| Museum repositories: | GSC |
Metadata
| Database number: | 173990 | ||
| Authorizer: | P. Wagner | Enterer: | P. Wagner |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2015-10-22 21:08:37 | Last modified: | 2015-10-22 21:09:54 |
| Access level: | the public | Released: | 2015-10-22 21:08:37 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 11416. | W. H. Twenhofel. 1928. Geology of Anticosti Island. Geological Survey of Canada Memoir 154(2132):1-351 [P. Wagner/P. Wagner/P. Wagner] |