The tomb of Carreg Coetan was erected during the Neolithic period around 3000 BC. Burial chambers were built and used by local farming communities.
The remains of the burial chamber consist of four stones supporting the 2.8 meters long capstone, which originally served as the ceiling. Originally, the whole was placed under an earth or stone-earth mound (cairn). Excavations from 1979 and 1980 revealed that it was round, had a diameter of about 11 meters and was fenced on the edges with smaller boulders. Only one small section of the mound remained, under which neolithic pottery was located. The pots were probably used as cremation urns, because there were plenty of charcoal and pieces of cremated bones of adult people around. They lay on the surface carefully arranged with small pieces of stone slabs. A large amount of other Neolithic pottery, fragments of axes, flint knives and scrapers were also found outside the burial chamber.
Castleden R., Neolithic Britain: New Stone Age sites of England, Scotland and Wales, London 1992.
Website stone-circles.org.uk, Carreg Coetan Arthur Neolithic Chambered Tomb / Dolmen.