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FourWinds wrote:
It would also fit something like a set of concentric circles about 9 foot across. Just like you might find on a big millstone.
Intruiging, FW. What would a 9ft millstone weigh, I wonder? Would its weight make it difficult to operate? Never given this much thought. Apparently, a 4'6 one weighs 1400 lbs (636 kg):

http://www.millstones.com/store/shop/item.asp?itemid=67

Obviously, its geology would make a difference...any idea what sort of stone it is, SL?

Peace

Pilgrim

X

Bolton has a mainly sandstone geology; there's plenty of Millstone Grit about. But this rock is a soft, friable sandstone, studded with myriad pieces of white quartz.