Out for a walk on Saturday and noticed this at 54.1765861 N  ,  -2.0413616 W on Cam Head. Looks like it is in the Grassington Grit but there is some limestone evident and looking at the BGS Geology viewer it's not too far above limestone. Someone might want to have a poke about.

Also makes me wonder if we shouldn't have some sort of "registry" of sites of interest, I know some clubs have books etc. but a lot of knowledge must be being lost because it is never shared.