Glyn Ceiriog, Cyrn-y-brain Fm.: Rawtheyan, United Kingdom
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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? Brogniartella sp.
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Strophomenata
- Orthotetida
- Triplesiidae
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Oxoplecia cf. plicata
(Wiman 1907)
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Triplesia plicata | ||||||||||
Strophomenata
- Orthotetida
- Chilidiopsidae
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Fardenia scotica
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Strophomenata
- Strophomenida
- Sowerbyellidae
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Eoplectodonta sp.
Kozlowski 1929
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Sowerbyella cf. sladensis
Jones 1928
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Strophomenata
- Strophomenida
- Rafinesquinidae
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Leptaena cf. rugosa
Dalman 1828
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Strophomenata
- Strophomenida
- Leptostrophiidae
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Eostropheodonta hirnantensis
(M'Coy 1851)
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Strophomenata
- Strophomenida
- Strophomenidae
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Strophomena ceiriogensis
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Strophomenata
- Strophomenida
- Glyptomenidae
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Mjoesina marri
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Strophomenata
- Billingsellida
- Clitambonitidae
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Vellamo cf. diversa
(Shaler 1865)
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Rhynchonellata
- Orthida
- Orthidiellidae
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Portranella sp.
Wright 1964
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Rhynchonellata
- Orthida
- Plaesiomyidae
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Plaesiomys porcata
(M'Coy 1846)
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Rhynchonellata
- Orthida
- Hesperorthidae
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Dolerorthis aff. intercostata
(de Sowerby and Murchison 1839)
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original and current combination Orthis intercostata | ||||||||||
Rhynchonellata
- Orthida
- Plectorthidae
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Schizophorella cf. fallax
(Salter 1846)
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ssp. silicis | ||||||||||
Rhynchonellata
- Orthida
- Platystrophiidae
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Platystrophia lutkevichi
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ssp. costellata | ||||||||||
Rhynchonellata
- Orthida
- Dicoelosiidae
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Epitomyonia sp.
Wright 1968
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Rhynchonellata
- Orthida
- Dalmanellidae
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? Dalmanella sp.
Hall and Clarke 1892
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Dalmanella cf. testudinaria
(Dalman 1828)
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original and current combination Orthis testudinaria | ||||||||||
Rhynchonellata
- Atrypida
- Atrypinidae
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Plectatrypa cf. gaspeensis
Schuchert and Cooper 1930
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recombined as Spirigerina (Eospirigerina) gaspeensis | ||||||||||
Rhynchonellata
- Athyridida
- Meristellidae
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Cryptothyrella crassa
(Sowerby 1839)
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ssp. incipiens | ||||||||||
= Hindella incipiens
Williams 1951
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Cocks 2014 | |||||||||
see common names |
Geography
Country: | United Kingdom | State/province: | Wales |
Coordinates: | 52.9° North, 3.2° West (view map) | ||
Paleocoordinates: | 45.7° South, 17.1° West | ||
Geographic resolution: | local area |
Time
Period: | Ordovician | Epoch: | Late/Upper Ordovician |
Stage: | middle Late Ordovician | *Epoch: | Ashgill |
*International age/stage: | Rawtheyan | ||
Key time interval: | Rawtheyan | ||
Age range of interval: | 455.80000 - 445.60000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Cyrn-y-brain |
Stratigraphic resolution: | formation |
Lithology and environment
Primary lithology: | grading lithified argillaceous,calcareous siltstone |
Secondary lithology: | sandstone |
Lithology description: 540 m tough cleaved siltstones and sandstones...soft, micaceous green and blue sandstone with a purple stain, slightly cleaved...dark blue, cleaved mudstones and siltstones, calcareous in places, lighter coloured siltstone laminations. rare sandstone units show graded bedding or ripple cross-lamination | |
Environment: | offshore |
Taphonomy
Modes of preservation: | body |
Collection methods and comments
Collection methods: | field collection |
Reason for describing collection: | biostratigraphic analysis |
Metadata
Database number: | 8293 | ||
Authorizer: | J. Alroy, P. Wagner | Enterer: | M. Sommers, P. Wagner | Research group: | marine invertebrate |
Created: | 2000-07-05 13:18:14 | Last modified: | 2000-07-05 16:18:14 |
Access level: | the public | Released: | 2000-11-20 13:53:37 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
569. | N. Hiller. 1981. The Ashgill rocks of the Glyn Ceirog district, North Wales. Geological Journal 16:181-200 [J. Alroy/M. Sommers/M. Uhen] |
Secondary references:
62099 | L. R. M. Cocks. 2014. The Late Ordovician brachiopods of southern Pembrokeshire and adjacent south-western Wales. Special Papers in Palaeontology 91:1-89 [P. Wagner/P. Wagner] |