Moughton Whetstone Hole SD 78447 - 71902
The Moughton Whetstone is a concentrically banded, (red/purple and green), mudstone that was quarried to make whetstones for the Sheffield razor industry.
I thought I'd add this as a reply
a carnivorous plant with sticky leaves to catch flies etc.
and in season lots of Wheatears feeding their young here with a Crane Fly larve
just thought I'd share, thanks Bernard cheers all Danny