The Burren - Black Head

© photo : Mathieu Morverand

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Formed some 340 million years ago at the bottom of a warm, shallow sea, the visibly fossil-rich layers of limestone that characterise the Burren have been modified by millions of years of glacial, tectonic, solutional and human processes. The result is a wonderfully rich, undulating series of swirls, tiers, cliffs, caves, hollows and bare pavements, classical features of what is described as a 'karst' landscape.