Brockram is an amazing stone I've seen in the Vale of Eden. Carboniferous limestone from when we were in a coral sea was then eroded when we were in a desert as far north as the Sahara. The stones were not transported far in wadis so they are large and angular and were set into sandstone. Such an amazing story that you can follow down the valley. This stone in a stone circle on Moor Divock between Pooley Bridge and Askham seems almost certain to be brockram, probably getting up there by glacial transport over a few miles.
