Lancashire 18
Image by spencer

Yeah, "natural scarp outcrop" describes well what I thought as well.

I wish we had more LIDAR coverage in Scotland! I have a few possible destroyed stone circle sites I'd love to investigate further. But I suppose all the scanning stuff will get better over time.

One hopes.. the scarcity of Argyll LIDAR is very frustrating. I hope that at least the new hi res Google Earth pix become widespread soon. The current imagery of the area NW of Sheffield where I’m fieldwalking most at the moment is sh*te.