Cynwyd Forest Quarry
Site of Special Scientific Interest in Wales
Cynwyd Forest Quarry (Welsh: Chwarel Coedwig Cynwyd) is a Site of Special Scientific Interest (SSSI) located aside a track within the Cynwyd Forest near Corwen, Denbighshire, North Wales.
Sometimes referred to in literature as 'Bwlch y Gaseg' and in very close proximity to the area of the same name. It was described by Rushton et al. (2000) and exposes Late Ordovician micaceous siltstones and mudstones of the Dolhir Formation (Ashgill Series, Rawtheyan Stage) which yields a rich shelly (brachiopod) fauna. Trilobites are represented by several genera although the fauna is dominated by Gravicalymene arcuata Price, 1982. Bivalves, bryozoans and various Echinodermata (Crinoids and Cystoids) are also present. Examples of most of the fossils listed below are illustrated and briefly described (or remarked upon) in "Fossils of the Upper Ordovician" by Harper and Owen (Eds.).
Fossils include
Bryozoa:
Pinnatoporella carinata (Etheridge)
Phylloporina sp.
Graptodictya sp.
Brachiopoda:
Leptaena sp.
The public source identifies “Cynwyd Forest Quarry” as site of Special Scientific Interest in Wales. This brief keeps that definition visible, then builds a research path around Cynwyd, Forest and Quarry.
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Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Jul 8, 2026. The linked authority identifier is Q20588819. Authority coordinates are 52.949, -3.354. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2000 and 1982.
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This entry incorporates text from “Cynwyd Forest Quarry” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.