Allt-Tair-ffynon Beds at Allt y Gadair: Longvillian, United Kingdom
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Strophomenata
- Strophomenida
- Rafinesquinidae
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Macrocoelia indet.
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Rhynchonellata
- Orthida
- Dalmanellidae
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Dalmanella indet.
Hall and Clarke 1892
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Gastropoda
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Gastropoda indet.
Cuvier 1795
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Gastropoda
- Euomphalina
- Platyceratidae
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Cyclonema crebristria
(M'Coy 1851)
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Bivalvia
- Modiomorphida
- Modiomorphidae
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Orthodesma sp.
Hall and Whitfield 1875
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Cymatonota verisimilis n. sp.
Tunnicliff 1987
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Goniophora sp.
Phillips 1848
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Bivalvia
- Pseudarcidae
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Pseudarca celtica n. sp.
Tunnicliff 1987
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Bivalvia
- Cyrtodontida
- Cyrtodontidae
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? Palaearca bulla n. sp.
Salter 1865
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Salter 1865 | |||||||||
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Bivalvia
- Ostreida
- Myodakryotidae
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Myodakryotus deigryn n. gen., n. sp.
Tunnicliff 1987
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Tergomya
- Cyrtonellida
- Cyrtolitidae
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Cyrtolites nodosus
(Salter and Aveline 1854)
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Trilobita
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Trilobita indet.
Walch 1771
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| see common names | ||||||||||
Geography
| Country: | United Kingdom | State/province: | Wales | County: | Powys |
| Coordinates: | 52.8° North, 3.3° West (view map) | ||||
| Paleocoordinates: | 52.4° South, 18.1° West |
Time
| Period: | Ordovician | Epoch: | Late Ordovician |
| Stage: | Sandbian | 10 m.y. bin: | Ordovician 4 |
| *Period: | Late/Upper Ordovician | *Epoch: | Middle Caradoc |
| *International age/stage: | Soudleyan - Longvillian | ||
| Key time interval: | Longvillian | ||
| Age range of interval: | 457.4 - 455.2 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Local section: | Allt y Gadair | Local bed: | Allt-Tair-ffynon Beds | ||
| Stratigraphy comments: Author concludes that exposures yeilding the fauna described herein are no longer present and are likely covered.
Was Soudleyan-Longvillian, but Tunnicliff (1987) says Longvillian. | |||||
Lithology and environment
| Primary lithology: | red or brown mudstone |
| Includes fossils? | Y |
| Lithology description: highly fossiliferous, fine-grained rotten mudstone which is chocolate brown in color when weathered. | |
| Environment: | marine indet. |
Taphonomy
Collection methods and comments
| Collection excludes: | all microfossils |
| Collection methods: | survey of museum collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 13832 | ||
| Authorizer: | A. Miller | Enterer: | R. Krause |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2002-04-29 12:48:18 | Last modified: | 2008-11-07 20:47:15 |
| Access level: | the public | Released: | 2002-04-29 12:48:18 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 6156. | S.P. Tunnicliff. 1987. Caradocian bivalve molluscs from Wales. Palaeontology 30(4):677-690 [A. Miller/R. Krause/R. Krause] |
Secondary references:
| 16313 | J. W. Salter. 1865. Appendix. On the fossils of North Wales. In A. C. Ramsay (ed.), The Geology of North Wales. Memoirs of the Geological Survey of Great Britain and of the Museum of Practical Geology 3:241-363 [P. Wagner/P. Wagner/P. Wagner] |