What is recorded here

Clogwyn Du 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.

Clogwyn Du is a sea cliff composed primarily of Silurian greywacke and slate, formed around 440–420 million years ago through sedimentation and subsequent regional metamorphism. It is notable for its exposure of ancient volcanic and sedimentary rocks that are part of the Caledonide mountain belt, offering insights into Wales' complex geological history.

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