Glyn Ceiriog, Cyrn-y-brain Fm.: Rawtheyan, United Kingdom

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
? Brogniartella sp.
Strophomenata - Orthotetida - Triplesiidae
Oxoplecia cf. plicata (Wiman 1907)
Triplesia plicata
Strophomenata - Orthotetida - Chilidiopsidae
Fardenia scotica
Strophomenata - Strophomenida - Sowerbyellidae
Eoplectodonta sp. Kozlowski 1929
Sowerbyella cf. sladensis Jones 1928
Strophomenata - Strophomenida - Rafinesquinidae
Leptaena cf. rugosa Dalman 1828
Strophomenata - Strophomenida - Leptostrophiidae
Eostropheodonta hirnantensis (M'Coy 1851)
Strophomenata - Strophomenida - Strophomenidae
Strophomena ceiriogensis
Strophomenata - Strophomenida - Glyptomenidae
Mjoesina marri
Strophomenata - Billingsellida - Clitambonitidae
Vellamo cf. diversa (Shaler 1865)
Rhynchonellata - Orthida - Orthidiellidae
Portranella sp. Wright 1964
Rhynchonellata - Orthida - Plaesiomyidae
Plaesiomys porcata (M'Coy 1846)
Rhynchonellata - Orthida - Hesperorthidae
Dolerorthis aff. intercostata (de Sowerby and Murchison 1839)
original and current combination Orthis intercostata
Rhynchonellata - Orthida - Plectorthidae
Schizophorella cf. fallax (Salter 1846)
ssp. silicis
Rhynchonellata - Orthida - Platystrophiidae
Platystrophia lutkevichi
ssp. costellata
Rhynchonellata - Orthida - Dicoelosiidae
Epitomyonia sp. Wright 1968
Rhynchonellata - Orthida - Dalmanellidae
? Dalmanella sp. Hall and Clarke 1892
Dalmanella cf. testudinaria (Dalman 1828)
original and current combination Orthis testudinaria
Rhynchonellata - Atrypida - Atrypinidae
Plectatrypa cf. gaspeensis Schuchert and Cooper 1930
recombined as Spirigerina (Eospirigerina) gaspeensis
Rhynchonellata - Athyridida - Meristellidae
Cryptothyrella crassa (Sowerby 1839)
ssp. incipiens
    = Hindella incipiens Williams 1951
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]