The rocks that make up the Cliffs of Moher were formed over 300 million years ago during the Upper Carboniferous period. If you look over the cliff edge, you’ll notice long horizontal layers of rock, also called strata. These layers are made of siltstone, shale and sandstone. Their fractured look was created because of the movement of the tectonic plates on the Earth’s crust.
They are named after an old fort, “Mothar” or “Moher”, which once stood sentry on Hag’s Head to the south.
The Burren and Cliffs of Moher Geopark has been designated as a UNESCO site and is one of 120 UNESCO Global Geoparks across the world.
The Waterford Charter Roll