Anticosti Island, Southwest Point, Chicotte Formation: Alexandrian, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Anthozoa
- Cystiphyllida
- Tryplasmatidae
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Porpites sp.
Schlotheim 1820
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Trilobita
- Corynexochida
- Illaenidae
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Stenopareia sp.
Holm 1886
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Gastropoda
- Euomphalina
- Platyceratidae
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Platyceras sp.
Conrad 1840
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Cyclonema sp.
Hall 1852
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unclassified
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Periechocrinites sp.
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Pseudospharexochus canadensis
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Gastropoda
- Bellerophontida
- Bucaniidae
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Salpingostoma sp.
Roemer 1876
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Bivalvia
- Myalinida
- Ambonychiidae
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Ambonychia sp.
Hall 1847
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Rhynchonellata
- Spiriferida
- Cyrtiidae
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Eospirifer radiatus
(Sowerby 1834)
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Cyrtia myrtea
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Rhynchonellata
- Pentamerida
- Stricklandiidae
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Costistricklandia sp.
Amsden 1953
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Crinoidea
- Monobathrida
- Eucalyptocrinitidae
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Eucalyptocrinites sp.
Goldfuss 1831
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| see common names | |||||||
Geography
| Country: | Canada | State/province: | Québec |
| Coordinates: | 49.4° North, 63.6° West (view map) | ||
| Paleocoordinates: | 22.1° South, 87.0° West (Wright 2013) | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Silurian | Epoch: | Llandovery |
| 10 m.y. bin: | Silurian 1 | ||
| *Period: | Early/Lower Silurian | *Epoch: | Early/Lower Llandoverian - Early/Lower Wenlockian | *Local age/stage: | Alexandrian - Niagaran |
| Key time interval: | Alexandrian | Zone: | Icriodella inconstans |
| Age range of interval: | 443.8 - 438.7 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Lithology and environment
| Primary lithology: | gray grainstone |
| Secondary lithology: | gray argillaceous grainstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "[M]assive- to thick-bedded, light grey, coarse, crinoidal grainstone and interbeds of medium-bedded, green-grey, argillaceous crinoidal grainstone that tend to be recessive in the cliff faces and less common toward the top of the section." Locally cross-stratified. | |
| Environment: | carbonate indet. |
| Geology comments: Environmental call by T. Hanson. | |
Taphonomy
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: Collection composed almost entirely of encrinite debris but with some brachiopods and rarer corals and stromatoporids. | |
Metadata
| Database number: | 24442 | ||
| Authorizer: | S. Holland | Enterer: | T. Hanson |
| Modifier: | T. Hanson | Research group: | marine invertebrate |
| Created: | 2002-08-07 15:15:07 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2002-08-07 15:15:07 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 6866. | C. R. Barnes, A. A. Petryk, and T. E. Bolton. 1981. Anticosti Island, Québec. In P. J. Lespérance (ed.), Field meeting, Anticosti-Gaspé, Québec, 1981: IUGS Subcommssion on Silurian Stratigraphy, Ordovician-Silurian Boundary Working Group Guidebook 1:1-24 [S. Holland/T. Hanson/S. Bruning] |