Description
Carn Menyn sits on top of the ridge of the Preseli Hills in Pembrokeshire. A quarry below the tor has been suggested as one of the sources for the upright menhirs used at Stonehenge. The rock type is spotted dolerite, also known as Preseli Bluestone, and it was used for carving tools and axes in prehistoric times. Many artifacts made from this igneous rock have been unearthed throughout the British Isles.
