The Carreg Cennen Disturbance is a zone of geological faults and folds in south and mid Wales which forms a part of both the Church Stretton Fault Zone and the Welsh Borderland Fault System. To the southwest it is known as the 'Llandyfaelog Disturbance'.[1]
These structures which stretch from Pembrokeshire to Shropshire are thought to have originated during the Caledonian Orogeny or mountain-building period.