On the surface of the earth's land, there are many winding and strange mountains. The mountain consists of three parts: the top, the hillside and the foot, with an average height of more than 500 meters above sea level. They are different from the plateau with small peak area and the hills with large height. These mountains are mountainous and live together in groups, forming a family of mountain people.
The surface forms of mountains are peculiar and diverse, some of which are parallel to each other and stretch for thousands of kilometers; Some overlap and are uneven, with mountains in the mountains and mountains outside. The scale of the mountain is also different. According to the height of the mountain, it can be divided into high mountain, middle mountain and low mountain. Above 3500 meters above sea level is called high mountain, above 1000-3500 meters is called Zhongshan, and below 1000 meters is called low mountain. According to the origin of the mountain, it can be divided into fold mountain, fault mountain, fold-fault mountain, volcano and erosion mountain. The folded mountain is formed by the strata in the earth's crust being squeezed by horizontal force and bent upward into an arch. The fault mountain is formed by the vertical force on the rock stratum, which breaks the rock stratum and then is lifted. Himalayan Mountain is a typical folded mountain, Lushan Mountain in Jiangxi Province is a fault mountain, and Tianshan Mountain belongs to a folded fault mountain.
Mountain is the basic terrain of the mainland, which is widely distributed. Especially in Eurasia, South America and North America. Most of the mountains in China are located in the west, and Himalayas, Kunlun Mountain, Tanggula Mountain, Tianshan Mountain and Altai Mountain are all famous mountains.
Due to the high altitude and low temperature in mountainous areas, it is suitable for planting a variety of vegetation and economic trees.