Millstone Grit

Definition and stakes

1911 Encyclopædia Britannica (1911)

“ The shales of the Millstone Grit include thin beds of marine goniatites (Glyphioceras bilingue, Gastrioceras carbonarium) , Pterinopecten papyraceus, and Lingula mytiloides, while the grits contain Lepidodendron, Stigmaria and calamites. In Scotland plants and estuarine fishes differ markedly above and below the Roslin Sandstone.
The English Millstone Grit produces a characteristic scenery of wild moorland plateaux, or alternations of shale-valleys and rugged grit-ridges. The grits furnish valuable building-stones, and grindstones. They also afford an excellent water supply.
”
Source: Wikisource

author:John Gilbert Baker,  A new flora of Northumberland and Durham with sketches of its climate and physical geography (1867)

“ The thickness in Northumberland is about 500 feet; and this corresponds pretty nearly with Forster's section of the formation southward of the Stublick Dike. The characteristic beds are thick gritty sandstones, which sometimes have supplied millstones, and hence the name Millstone Grit. Such beds are made up chiefly of rounded pebbles of quartz and felspar bound together by a siliceous cement : some pebbles in the rock are as large nuts, and some few an inch in diameter. ”
Source: Wikisource

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