Anticosti Island, Chicotte River, Jupiter Formation Member 6 Graptolites: Alexandrian, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Pterobranchia
- Graptoloidea
- Monograptidae
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Monograptus sedgwickii
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| see common names | |||||||
Geography
| Country: | Canada | State/province: | Québec |
| Coordinates: | 49.2° North, 63.1° West (view map) | ||
| Paleocoordinates: | 22.3° South, 86.6° West (Wright 2013) | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Silurian | Epoch: | Llandovery |
| 10 m.y. bin: | Silurian 1 | ||
| *Period: | Early/Lower Silurian | *Epoch: | Llandoverian | *Local age/stage: | Alexandrian - Niagaran |
| Key time interval: | Alexandrian | ||
| Age range of interval: | 443.8 - 438.7 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Lithology and environment
| Primary lithology: | argillaceous lime mudstone |
| Secondary lithology: | calcareous "shale" |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "[T]hin- to medium-bedded, brown-grey, argillaceous to marly lime mudstone to local wackestone, weathering grey-yellow, intergrading with highly calcareous shale." Lithology from C. R. Barnes, A. A. Petryk and T. E. Bolton. 1981. Anticosti Island, Québec. Field meeting, Anticosti-Gaspé, Québec, 1981: IUGS Subcommssion on Silurian Stratigraphy, Ordovician-Silurian Boundary Working Group Guidebook 1:1-24. Edited by P. J. Lespérance. | |
| Environment: | carbonate indet. |
| Geology comments: Environmental call by T. Hanson. | |
Taphonomy
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: Graptolites only; from Petryk's collections made from 1975-1977 and 1979. Individual collections described in reference. | |
Metadata
| Database number: | 24826 | ||
| Authorizer: | S. Holland | Enterer: | T. Hanson |
| Modifier: | S. Holland | Research group: | marine invertebrate |
| Created: | 2002-08-21 07:13:48 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2002-08-21 07:13:48 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 6922. | J. Riva and A. A. Petryk. 1981. Graptolites from the Upper Ordovician and Lower Silurian of Anticosti Island and the position of the Ordovician-Silurian boundary. Field meeting, Anticosti-Gaspé, Québec, 1981: IUGS Subcommssion on Silurian Stratigraphy, Ordovician-Silurian Boundary Working Group, Stratigraphy and Paleontology 2:159-164 [S. Holland/T. Hanson/S. Holland] |