Why this matters
An Dúna is a headland composed primarily of Carboniferous limestone, formed around 340 to 320 million years ago through the accumulation of marine sediments. It is notable for its exposure of layered sedimentary rock that provides insight into ancient marine environments in the region.
What is recorded here
An Dúna is recorded as a headland in County Mayo. Its open map record supplies this location and any linked names or public references.