bed 11: Rhuddanian, Canada
collected by Cocks and Copper
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Anthozoa
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Rugosa indet.
(Milne-Edwards and Haime 1850)
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Copper and Jin 2014 | |||||||||
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Anthozoa
- Stauriida
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Streptelasmatina indet.
Wedekind 1927
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Trilobita
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Trilobita indet.
Walch 1771
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Copper and Jin 2014 | |||||||||
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Trilobita
- Phacopida
- Calymenidae
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Calymenidae indet.
Milne-Edwards 1840
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unclassified
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Bryozoa indet.
Ehrenberg 1831
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Rhynchonellata
- Athyridida
- Meristellidae
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Koigia sp.
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Copper and Jin 2014 | |||||||||
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Cryptothyrella ? sp.
Cooper 1942
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Rhynchonellata
- Orthida
- Dalmanellidae
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Isorthis sp.
Kozlowski 1929
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Rhynchonellata
- Atrypida
- Septatrypidae
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Becscia sp.
Copper 1995
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Copper and Jin 2014 | |||||||||
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Rhynchonellata
- Atrypida
- Atrypinidae
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"Atrypina" gamachiana
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| Twenhofel 1928 | ||||||||||
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Strophomenata
- Strophomenida
- Leptostrophiidae
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aff. Leptostrophia reedi
Bancroft 1949
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| Bancroft 1949 | ||||||||||
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Strophomenata
- Strophomenida
- Eopholidostrophiidae
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Eopholidostrophia sp.
Harper et al. 1967
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Strophomenata
- Strophomenida
- Rafinesquinidae
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cf. Leptaena contermina
Cocks 1968
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| Cocks 1968 | ||||||||||
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unclassified
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Crinoida indet.
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Gastropoda
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Gastropoda indet.
Cuvier 1795
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| see common names | ||||||||||
Geography
| Country: | Canada | State/province: | Quebec |
| Coordinates: | 49.3° North, 61.8° West (view map) | ||
| Paleocoordinates: | 21.0° South, 88.0° West (Wright 2013) | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | small collection |
Time
| Period: | Silurian | Epoch: | Llandovery |
| Stage: | Rhuddanian | 10 m.y. bin: | Silurian 1 |
| Key time interval: | Rhuddanian | ||
| Age range of interval: | 443.8 - 440.8 m.y. ago |
Stratigraphy
| Formation: | Becscie | Member: | Fox Cove |
| Local section: | Anticosti localities A216-217 | Local bed: | Bed 11 |
| Local order: | bottom to top |
Lithology and environment
| Primary lithology: | "cross stratification" lithified muddy,calcareous lime mudstone |
| Secondary lithology: | lithified muddy,calcareous "shale" |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: [...] a 7 m thick unit, which we agree with Twenhofel can be taken as the local base of the Becscie Formation. It consists of thinly bedded micrite, with minor calcareous shale partings, and some small-scale cross-bedding and ripples. | |
| Environment: | deep subtidal ramp |
| Glacial or sequence phase: | transgressive |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
| Spatial resolution: | allochthonous |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | general faunal/floral analysis |
| Museum repositories: | GSC |
| Collectors: | Cocks and Copper |
Metadata
| Database number: | 194353 | ||
| Authorizer: | U. Balthasar | Enterer: | U. Balthasar |
| Modifier: | U. Balthasar | Research group: | marine invertebrate |
| Created: | 2018-06-18 09:51:55 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2018-06-18 09:51:55 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 65961. | L. R. M. Cocks and P. Copper. 1981. The Ordovician-Silurian boundary at the eastern end of Anticosti Island. Canadian Journal of Earth Sciences 18:1029-1034 [U. Balthasar/U. Balthasar] |
Secondary references:
| 66172 | P. Copper and J. Jin. 2014. The revised Lower Silurian (Rhuddanian) Becscie Formation, Anticosti Island, eastern Canada records the tropical marine faunal recovery from the end-Ordovician Mass Extinction. Newsletters on Stratigraphy 47(1):61-83 [U. Balthasar/U. Balthasar] |