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Encyclopedia > Gritstone
The Salt Cellar, a gritstone tor on Derwent Edge in the Peak District

Gritstone is a sedimentary rock composed of coarse sand grains with inclusions of small stones. It is a coarser version of sandstone. It was laid down in the late (upper) Paleozoic era, in the Carboniferous period, in delta conditions. Image File history File links Metadata Size of this preview: 740 × 599 pixelsFull resolution (1263 × 1023 pixel, file size: 51 KB, MIME type: image/jpeg) Personal photograph taken 21st January 2006 by Mick Knapton I, the creator of this work, hereby grant the permission to copy, distribute and/or modify... Image File history File links Metadata Size of this preview: 740 × 599 pixelsFull resolution (1263 × 1023 pixel, file size: 51 KB, MIME type: image/jpeg) Personal photograph taken 21st January 2006 by Mick Knapton I, the creator of this work, hereby grant the permission to copy, distribute and/or modify... The Cakes of Bread, Height approximately 15 feet (4. ... The Peak District is an upland area in central and northern England, lying mainly in northern Derbyshire, but also covering parts of Cheshire, Greater Manchester, Staffordshire, and South and West Yorkshire. ... Two types of sedimentary rock: limey shale overlaid by limestone. ... Red sandstone interior of Lower Antelope Canyon, Arizona, worn smooth due to erosion by flash flooding over millions of years Sandstone is a sedimentary rock composed mainly of sand-size mineral or rock grains. ... The Paleozoic Era (from the Greek palaio, old and zoion, animals, meaning ancient life) is the earliest of three geologic eras of the Phanerozoic eon. ... The Carboniferous is a major division of the geologic timescale that extends from the end of the Devonian period, about 359. ...


Gritstone is a sedimentary rock and frequently shows signs of cross-bedding or current bedding. Two types of sedimentary rock: limey shale overlaid by limestone. ... Cross bedding is a geological term referring to the way a sedimentary deposit is affected by water currents, during its formation. ...


It is quarried for building material. British gritstone was used for millstones to mill flour and grindstones to sharpen blades, giving rise to its other common name of millstone grit. For other uses, see Quarry (disambiguation). ... The interior of a functional water mill The basic anatomy of a millstone. ... Sandstone grinding wheel A grindstone is a tool used for grinding or sharpening tools. ...


The rock is much loved by English climbers, among whom it has almost cult status and is often referred to as "God's own rock". The rough surface provides outstanding friction, enabling climbers to stand on or grip the subtlest of features in the rock. Rock climbers on Valkyrie at The Roaches in Staffordshire, England. ...


See also


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Gritstone - Wikipedia, the free encyclopedia (123 words)
Gritstone is a sedimentary rock composed of coarse sand grains with inclusions of small stones.
Gritstone is laid down in water and frequently shows signs of cross bedding or current bedding.
British gritstone was used for millstones to mill flour and sharpen blades, giving rise to its other common name of millstone grit.
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