Because of the sun, geomantic omen, earthquakes and volcanoes, many people in nature

Many large rocks in nature may break and form smaller granular sand and clay due to the action of solar geomantic earthquakes and volcanoes.

Clay is a kind of cohesive soil, which contains less sand and is difficult for water to pass through, so it has good plasticity. It is an important mineral raw material. Is a very small particle (

Sand or sand making is a granular substance. Sand is a naturally formed subdivided rock with a size of 0.0625 to 2 mm. Individual particles in this range are called sand grains. In geology, the next smaller classification is mud, and its particle size ranges from 0.004 to 0.0625 mm.