Sand refers to hills, mounds or higher places smaller than mountains. The so-called one inch high is sand, which is also called. Sand, the mountains around the cave. According to the concept of feng shui, mountains are thick and fat, thin and hungry, clear and expensive, sad and sad, people gather, people leave, mountains are brave and narrow, mountains are bright and mysterious, and mountains are obedient and filial.
The shape of this mountain is changeable. Those who look at the square from the left and the circle from the right, look at the right from the top, look at the side from the bottom, face up ugly, and look beautiful from the side. To change the mountain shape, the key lies in acupuncture points. Good acupoint selection can make distant mountains closer, high mountains lower, evil mountains more beautiful, ugly mountains more beautiful, and slopes more correct. The shape of sand is very different, and the movement of stones is also very different. Sand is connected with water, sand closes water and water closes sand.
The sand in the cave is close to Chen Yuanshui, the sand in the dragon and tiger cares about water, the sand in the recent case is close to the water in the hall, and the sand in the outer yard is close to the dragon water. The front and back sides of the cave are covered with sand to keep out the evil wind. What came out of the dragon's arms was sand protector, which blocked the concave wind and increased the momentum inside. Around the cave is facing the sand, while in front of it is facing the sand. Water to the left, sand to the right. Water to the right, sand to the left.
Geologically, minerals or rock particles with a particle size of 0.074~2mm are called sand, and those with a particle size larger than 2mm are called gravel or breccia (the difference between them lies in their different roundness. See the entry conglomerate and sandstone for details). If the gravel in the gravel is mostly gravel, it is called gravel. Some people call sandstone "sandstone" in daily life.