Cliffs of Moher

The Cliffs are 700 feet high at the highest point and range for 5 miles along the West coast County Clare. The tower of the O'Brien Clan stands on a headland of the Cliffs. The cliffs consist mainly of beds of Namurian shale, sandstone and limestone with the oldest rocks being found at the bottom of the cliffs. It is possible to see 300 million year-old river channels cutting through, forming unconformities at the base of the cliffs.