In reply to Chris Craggs:
> (In reply to NobbyClark)
>
> As said, Barton Quarry, we were bouldering there back in the 1960s. The rock is amazing, made up of 100% crinoids. Good fingery problems galore,
>
Blimey, I have blithely dismissed it hundreds of times, my parents live very near it, I have driven past it loads and never bothered to check it out - just assumed it was choss!