Homard Road, Anticosti Island: Hirnantian, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Holocystitidae
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| see common names | |||||||
Geography
| Country: | Canada | State/province: | Quebec |
| Coordinates: | 49.4° North, 62.3° West (view map) | ||
| Paleocoordinates: | 20.2° South, 90.3° West (Wright 2013) | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | small collection |
Time
| Period: | Ordovician | Epoch: | Late Ordovician |
| Stage: | Hirnantian | 10 m.y. bin: | Ordovician 5 |
| Key time interval: | Hirnantian | ||
| Age range of interval: | 445.2 - 443.1 m.y. ago |
Stratigraphy
| Formation: | Ellis Bay | Member: | Laframboise | ||
| Stratigraphy comments: Although the position of the Ellis Bay – Becscie formational boundary in relation to the end-Ordovician extinction horizon remains a topic of discussion (Copper et al. 2013), the stratigraphic position of the Laframboise reefs is certain. The Laframboise Member of the Ellis Bay Formation is from the uppermost Hirnantian, and the reefs are at or very close to the top of this member, thus immediately prior to the Ordovician−Silurian boundary. |
Lithology and environment
| Primary lithology: | lithified "reef rocks" |
| Lithology description: stromatoporoid−coral−calcimicrobial reefs | |
| Environment: | reef, buildup or bioherm |
Taphonomy
| Modes of preservation: | body,original calcite |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 191373 | ||
| Authorizer: | S. Cole | Enterer: | S. Cole |
| Created: | 2018-01-24 16:50:36 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2018-01-24 16:50:36 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 64562. | S. L. Sheffield, W. I. Ausich, and C. D. Sumrall. 2018. Late Ordovician (Hirnantian) diploporitan fauna of Anticosti Island, Quebec, Canada: implications for evolutionary and biogeographic patterns. Canadian Journal of Earth Sciences 55(1):1-7 [S. Cole/S. Cole/S. Cole] |