Coflein says the following regarding the site:
‘An agglomeration of curvilinear enclosures, c.90m accross, set on ground falling to the W, amongst which are located seven circular structures, c.3.6-5.4m in diameter, these features being represented by stony banks, c.1.5m across & 0.3m high; features appear to have been refurbished as shelters....Generally similar features occur to the NE‘
Mynydd Du forms the lower section of Carnedd Dafydd’s great north-western ridge, rising above Cwm Pen – llafar. Plenty of water nearby, not least the Afon Llafar itself, but one assumes copious volumes fell from the sky during the Bronze Age, making this a spot for the hardy to live, an assumption supported by the ‘Black Mountain’ moniker. Needless to say, it still rains. A lot.
This is another site I didn’t appreciate at the time whilst ascending/descending the ridge....