Sandstone is a sedimentary rock composed mainly of sand-size mineral or rock grains. Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand, sandstone may be any color, but the most common colors are tan, brown, yellow, red, gray and white. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions.
Sandstone is a very common sedimentary rock and perhaps the best known sedimentary rock.It is formed in many environments.Just about anywhere there is water,whether frozen or not,in a river or ocean,there is a chance to form sandstone.Even where there is no water as in a desert,there is sandstone formation under foot.