A ring cairn is located on disturbed ground close to a junction of minor roads which traverse Gelligaer Common. It consists of an oval uneven, turf-covered stony area measuring 12m (north-east by south-west) by 11.5m within a stony bank measuring 1.5m wide and 0.2m high. From the inside bank on the south projects a grassy mound measuring 3m by 2m and 0.25m high. This is possibly spoil from the disturbed interior.

RCAHMW, Glamorgan Inventory I (i), n.161.
RCAHMW AP945107/41

David Leighton, RCAHMW, 8 October 2015