Millstone Grit

The Salt Cellar, a gritstone tor on Derwent Edge in the Peak District, England

Millstone Grit is the name given to any of a number of coarse-grained sandstones of Carboniferous age which occur in Northern England. The name derives from its use in earlier times as a source of millstones for use principally in watermills. Geologists refer to the whole suite of rocks that encompass the individual limestone beds and the intervening mudstones as the Millstone Grit Group. The term Millstone Grit Series was formerly used to refer to the rocks now included within the Millstone Grit Group together with the underlying Edale Shale Group.

单词	Millstone Grit
释义	Millstone Grit 英语百科 Millstone Grit Millstone Grit is the name given to any of a number of coarse-grained sandstones of Carboniferous age which occur in Northern England. The name derives from its use in earlier times as a source of millstones for use principally in watermills. Geologists refer to the whole suite of rocks that encompass the individual limestone beds and the intervening mudstones as the Millstone Grit Group. The term Millstone Grit Series was formerly used to refer to the rocks now included within the Millstone Grit Group together with the underlying Edale Shale Group.
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