(Redirected from
Millstone grit)
Gritstone is a sedimentary rock composed of coarse sand grains and is a coarser version of sandstone.
Gritstone is usually laid down in water and frequently shows signs of cross bedding or current bedding .
It is quarried for building material. British gritstone was used for millstones to mill flour and sharpen blades, giving rise to its other common name of millstone grit.
See also
