In reply to UKC News:
Good work. Is this in that odd quarry on the left as you drive towards Llanberis, towards the low end of the Pass? The one with the VS and the weird E2 or so up that stepped corner?
While googling to try and answer my question I find there is now something called the Clogwyn d'ur Arddhu Boulder, which it seems deserves more attention. A sign of our times!
jcm