Cwellyn Slate Quarry

Cwellyn Slate Quarry is shown as a cliff on the public map of Gwynedd. The saved point is the map point or the centre of its mapped shape.

Cwellyn Slate Quarry is a coastal rock feature composed primarily of slate, formed during the Ordovician period, around 470 to 440 million years ago, through regional metamorphism of shale. It is notable as part of the historically significant slate quarrying industry in north Wales, which contributed to local and international construction and architectural developments.