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An Dún Mór

Headland
An Dún Mór
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What is recorded here

An Dún Mór is a sea cliff or coastal rock feature composed of Silurian-age volcanic and sedimentary rocks, formed around 440–420 million years ago through volcanic activity and subsequent marine sedimentation. It is notable for its role in the geological history of southwest Ireland and as a potential marker of ancient coastal processes.

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Photo: Philip Pötsch, Philipweb · CC BY 4.0