A significant percentage of the rocks on Carn Menyn produce metallic sounds – like bells, gongs or tin drums – when struck with small hammerstones. Such sonic or musical rocks are referred to as ‘ringing rocks’ or ‘lithophones’.

The Landscape & Perception project drew upon the comments of the early ‘rock gong’ pioneer, Bernard Fagg, a one-time curator of the Pitt Rivers Museum, in Oxford.

He suspected there were ringing rocks on or around Preseli and suggested that this was the reason why so many Neolithic monuments exist in the region – with the sounds making the landscape sacred to Stone Age people.