Arisaig 13-57: Llandovery, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Strophomenata
- Strophomenida
- Strophochonetidae
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Protochonetes tenuistriatus
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14 %-specimens | |||||||||
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Rhynchonellata
- Orthida
- Dalmanellidae
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Visbyella nana
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10 %-specimens | |||||||||
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Rhynchonellata
- Rhynchonellida
- Camarotoechiidae
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Camarotoechia rossonia
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24 %-specimens | |||||||||
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Plagiorhyncha aff. glassi
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5 %-specimens | |||||||||
| originally entered as "Plagiorhyncha aff. glassi" | ||||||||||
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Rhynchonellata
- Rhynchonellida
- Leptocoeliidae
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Eocoelia sulcata
(Prouty 1923)
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37 %-specimens | |||||||||
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Rhynchonellata
- Atrypida
- Atrypidae
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Atrypa reticularis
(Linnaeus 1758)
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2 %-specimens | |||||||||
| original and current combination Anomia reticularis | ||||||||||
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Tentaculitida
- Tentaculitidae
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Tentaculites canadensis
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2 %-specimens | |||||||||
| see common names | ||||||||||
Geography
| Country: | Canada | State/province: | Nova Scotia | County: | Antigonish |
| Coordinates: | 45.6° North, 62.0° West (view map) | ||||
| Paleocoordinates: | 38.1° South, 32.1° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | small collection |
Time
| Period: | Silurian | Epoch: | Llandovery |
| 10 m.y. bin: | Silurian 1 | *Epoch: | Middle Llandovery - Late/Upper Llandovery |
| Key time interval: | Llandovery | ||
| Age range of interval: | 443.80000 - 433.40000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Ross Point | ||||
| Local section: | 13 | Local bed: | 57 | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Member: "uppermost middle and lower-half of upper" | |||||
Lithology and environment
| Primary lithology: | current ripples,bioturbation lithified argillaceous siltstone |
| Environment: | offshore |
| Geology comments: Heavily bioturbated shales and siltstone, siltstone predominating. Mixed with layers and lenses of laminated or wave-cross laminated siltstone. Water depth < 90 m. | |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Collection methods: | surface (in situ),mechanical,field collection |
| Reason for describing collection: | paleoecologic analysis |
| Taxonomic list comments:Ichnofossils: Chondrites, Planolites, Palaeophycus, Helminthopsis. Faunal count: 113. | |
Metadata
| Database number: | 3185 | ||
| Authorizer: | J. Alroy | Enterer: | M. Sommers |
| Modifier: | C. Visaggi | Research group: | marine invertebrate |
| Created: | 1999-07-27 14:15:23 | Last modified: | 2004-03-11 16:25:04 |
| Access level: | the public | Released: | 2000-11-20 13:53:18 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 134. | J. M. Hurst and R. K. Pickerill. 1986. The relationship between sedimentary facies and faunal associations in the Llandovery siliclastic Ross Brook Formation, Arisaig, Nova Scotia. Canadian Journal of Earth Science 23:705-726 [J. Alroy/M. Sommers/A. Clement] |