Given the hardness of the individual grains, uniformity of grain size, and friability of its structure, sandstone is an excellent material from which to make grindstones for sharpening blades and other implements.
Rock formations that are primarily sandstone usually allow percolation of water and are porous enough to store large quantities.
Sandstones are clastic in origin (as opposed to organic, like chalk and coal, or chemical, like gypsum and jasper).
Sandstone beds often form highly visible cliffs and other topographic features.
The environment of deposition is crucial in determining the characteristics of the resulting sandstone.
Some sandstones are resistant to weathering, yet are easy to work.
The formation of sandstone involves two principal stages.
Like sand, sandstone may be any color, but the most common colors are tan, brown, yellow, red, gray, and white.
Non-friable sandstone can be used to make grindstones for grinding grain (such as gritstone).
The colors of sandstone are usually tan or yellow, derived from a blend of the clear quartz with the dark amber feldspar content of the sand.
Most sandstone is composed of quartz and/or feldspar, because these are the most common minerals in the Earth's crust.
Fine-grained aquifers, such as sandstones, are more apt to filter out pollutants from the surface than are rocks with cracks and crevices, such as limestones or other rocks fractured by seismic activity.
Sandstone is a sedimentary rock composed mainly of sand-size mineral or rock grains.
Red sandstones are also seen in the Southwest and West of England, as well as central Europe and Mongolia.
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