O Dan y Dŵr - Hidden Seascapes of Wales

Careg Hen Sandwaves

Extensive, underwater sand waves off Trearddur Bay, Anglesey

(zoom in for a closer look)

False colour projection of multibeam sonar data (where colours represent different depths), illustrates the depth and physical composition of two square miles of seabed located three miles to the southwest of Trearddur Bay on Anglesey, close to a well-known, very shallow, rocky outcrop and popular dive site known locally as Careg Hen (Old Rock).

North Wales map with site highlighted

Careg_Hen sand waves (another view, with the depths profiled)

Careg_Hen depths (back to main Careg Hen page)