Middle Allt Ddu Group, Caradoc, Bala District, Merionethshire: Soudleyan, United Kingdom
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Strophomenata
- Strophomenida
- Sowerbyellidae
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Sowerbyella sericea
(Sowerby 1839)
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| recombined as Sowerbyella (Sowerbyella) sericea | |||||||
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Strophomenata
- Strophomenida
- Rafinesquinidae
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Macrocoelia prolata
Williams 1963
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| recombined as Colaptomena expansa prolata | |||||||
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Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
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Rostricellula sparsa
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Rhynchonellata
- Orthida
- Dalmanellidae
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Howellites intermedia
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| original and current combination Resserella (Howellites) | |||||||
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Howellites striata
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| original and current combination Resserella (Howellites) | |||||||
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Rhynchonellata
- Orthida
- Harknessellidae
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Reuschella cf. horderleyensis
Bancroft 1929
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| see common names | |||||||
Geography
| Country: | United Kingdom | State/province: | Wales | County: | Merionethshire |
| Coordinates: | 52.9° North, 3.6° West (view map) | ||||
| Paleocoordinates: | 52.2° South, 18.4° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | local area |
Time
| Period: | Ordovician | Epoch: | Late/Upper Ordovician |
| Stage: | Sandbian | 10 m.y. bin: | Ordovician 4 |
| Key time interval: | Soudleyan | ||
| Age range of interval: | 458.40000 - 457.40000 m.y. ago |
Stratigraphy
| Geological group: | Allt Ddu | ||||
| Stratigraphic resolution: | group | ||||
| Stratigraphy comments: "Middle Allt Ddu Group." Soudleyan in age. | |||||
Lithology and environment
| Primary lithology: | mudstone |
| Secondary lithology: | siltstone |
| Lithology description: Mudstones and siltstones with minor ashes and sandstones. | |
| Environment: | offshore indet. |
| Geology comments: This paper pays very little attention to the lithologic descriptions, focusing instead on correlation of brachiopod faunas. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Reason for describing collection: | biostratigraphic analysis |
| Taxonomic list comments:Brachiopods only. | |
Metadata
| Database number: | 43638 | ||
| Authorizer: | M. Patzkowsky | Enterer: | A. Krug |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2004-08-17 10:27:06 | Last modified: | 2015-05-01 22:32:43 |
| Access level: | the public | Released: | 2004-08-17 10:27:06 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 11461. | A. Williams. 1963. The Caradocian brachiopod faunas of the Bala District, Merionethshire. Bulletin of the British Museum of Natural History (Geology) 8(7):327-471 [M. Patzkowsky/A. Krug/P. Wagner] |