away. The islands of the group tend to be low-lying and sandy, subject to intense coastal erosion. Not unlike the Isles of Scilly, it is possible that Ceann Iar, Shivinish and Ceann Ear formed a single body of land within historic times, and that their land area has greatly decreased due to overgrazing, sea inundation, and wind erosion.

Smaller islands in the group include Deasker Deas-Sgeir, Shillay