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, formed around 440–420 million years ago through sedimentation and subsequent lithification in a deep marine environment. It is notable for its resistant rock formation, which has withstood coastal erosion, and may offer insights into the geological history of the Welsh Caledonides.

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