Ffridd y Tyllau: Moridunian, United Kingdom
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Orthocerida
- Baltoceratidae
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Castelloceras arennigense
Evans 2005
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1 specimen | |||||||||
| NMW 2001.7G.65 | ||||||||||
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Cephalopoda
- Ellesmerocerida
- Eothinoceratidae
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Saloceras sericeum
(Salter 1865)
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3 specimens | |||||||||
| NMW 2001.7G.4 to 2001.7G.6 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United Kingdom | State/province: | Wales | County: | Gwynedd |
| Coordinates: | 52.9° North, 3.8° West (view map) | ||||
| Paleocoordinates: | 47.2° South, 92.2° West (Wright 2013) | ||||
| Basis of coordinate: | stated in text | ||||
| Geographic resolution: | small collection |
Time
| Period: | Ordovician | Epoch: | Early Ordovician |
| Stage: | Floian | 10 m.y. bin: | Ordovician 2 |
| Key time interval: | Moridunian | Graptolite zone: | Tetragraptus phyllograptoides |
| Age range of interval: | 477.7 - 474.3 m.y. ago |
Stratigraphy
| Formation: | Carnedd Iago | Member: | Henllan Ash | ||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: "Henllan Ash Member, Carnedd Iago Formation. Moridunian Stage, Arenig Series, phyllograptoides Biozone." The Henllan Ash is identical to the Erwent and Ogygia Limestones of Fearnsides (1905) (Evans, 2005). | |||||
Lithology and environment
| Primary lithology: | argillaceous,calcareous sandstone |
| Includes fossils? | Y |
| Lithology description: "The massive jointed occasionally fracture cleaved sandstone, which commonly contains mudstone pellets, is grey and calcareous and has a characteristic 10 mm cream-weathering layer. Current bedding is sporadic. The entire rock was feldspathic and is now highly altered. The feldspar clasts are 0.25 to 0.75 mm and sub-rounded." (Lynas, 1973, J. Geol. Soc. Lond. 129(5)). This description refers to localities W and SW of Ffestiniog, about 5-10 km to the NNW. | |
| Environment: | coastal indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: NMW = National Museums and Galleries of Wales | |
Metadata
| Also known as: | locality 30 | ||
| Database number: | 89325 | ||
| Authorizer: | B. Kröger | Enterer: | T. Liebrecht |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2009-05-16 07:49:00 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2009-05-16 07:49:00 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 29341. | D. H. Evans. 2005. The Lower and Middle Ordovician cephalopod faunas of England and Wales. Monograph of the Palaeontographical Society 623:1-81 [B. Kröger/B. Kröger/B. Kröger] |