AN73: Aeronian, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Lichida
- Lichidae
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Arctinurus anticostiensis
(Northrop 1939)
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2 individuals | ||||||
| synonym of Anadesma shallopensis | |||||||
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Trilobita
- Phacopida
- Calymenidae
|
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Calymene nowlani
Chatterton and Ludvigsen 2004
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68 individuals | ||||||
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Diacalymene sp.
Kegel 1927
|
2 individuals | ||||||
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Trilobita
- Phacopida
- Cheiruridae
|
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? Hadromeros sp.
Lane 1971
|
1 individual | ||||||
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Trilobita
- Phacopida
- Encrinuridae
|
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Nucleurus anticostiensis
|
3 individuals | ||||||
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Encrinurus deomenos
Tripp 1962
|
6 individuals | ||||||
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Trilobita
- Phacopida
- Phacopidae
|
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Acernaspis orestes
(Billings 1860)
|
74 individuals | ||||||
| see common names | |||||||
Geography
| Country: | Canada | State/province: | Quebec | County: | Anticosti Island |
| Coordinates: | 49.2° North, 62.5° West (view map) | ||||
| Paleocoordinates: | 21.4° South, 35.0° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | small collection |
Time
| Period: | Silurian | Epoch: | Llandovery |
| Stage: | Aeronian | 10 m.y. bin: | Silurian 1 |
| Key time interval: | Aeronian | Conodont zone: | Ozarkodina clavula |
| Age range of interval: | 440.80000 - 438.50000 m.y. ago |
Stratigraphy
| Formation: | Gun River or Goeland | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: PJW: Was Gun River or basal Jupiter; in 2004 basal Jupiter was Goeland member, which is now in Meniér formation. These beds should span the Ozarkodina clavula conodont zone. | |||||
Lithology and environment
| Primary lithology: | lithified lime mudstone |
| Secondary lithology: | lithified "shale" |
| Lithology description: Gun River: hard, slabby, well-bedded micritic limestone and minor shale; flat pebble conglomerates in upper part. Jupiter: soft shales and limestone interbeds. Does not specify which lithology fossils sampled from | |
| Environment: | open shallow subtidal |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | surface (in situ),mechanical,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | GSC |
Metadata
| Database number: | 187764 | ||
| Authorizer: | M. Hopkins | Enterer: | M. Hopkins |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2017-08-11 15:25:50 | Last modified: | 2018-11-24 12:19:20 |
| Access level: | the public | Released: | 2017-08-11 15:25:50 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 61764. | B. D. E. Chatterton and R. Ludvigsen. 2004. Early Silurian trilobites of Anticosti Island, Québec, Canada. Palaeontographica Canadiana 22 [M. Hopkins/M. Hopkins] |