Sandstone is a natural stone that exists very close to the earth's surface. Name is derived from 'sand', which is the
main component of the stone.
Grains like sand, quartz and feldspar, from various rocks and plain land (mostly deserts) are eroded by water, wind,
ice, and other means in the form of erosion and weathering. These eroded grains accumulate at places to form large,
hard deposits on the surface of the land (in a desert), or on the bottom of water bodies (in a river or sea). When a lot
of grains accumulated at a certain place, they start forming a compressed body because of the pressure of the
overlaying deposits. At that time, cements such as calcite, clay or silica reach between the grains either through
precipitation, or by alteration of the grains themselves under pressure. These cements bind the grains to each other,
forming a very dense and hard rock that we know as Sandstone.