Gartheiniog Quarry
Merionethshire, United Kingdom
Gartheiniog quarry was a slate quarry served by the Hendre Ddu Tramway. It is located about a mile west of Aberangell in Merioneth (now Gwynedd), North Wales near the confluence of the Nant Maesygamfa and the Afon Angell. It worked the Narrow Vein, the highest-quality slate vein in the Abercorris Group.
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