From the photos it looks like a cross between Broadleas with its continuos boulder kerb and Beltany with its near continuous circle (but stones upright) and raised interior, not sure what the chamber in the middle is like but sounds like it could be a carrowmore-like chamber with no passage?? Thats why I would picture it fitting in with a divergence in traditions. Is there still parts of the cairn remaining, and if not why is it marked as a cairn on the map? I might take a trip up there too since I'm hoping to get to Reyfad in the next few weeks and some more stuff up those parts.