Mountains are the sites of the earth's surface lifted over the plain and sharply dismembered. They occupy 24% of all Earth's surface, have the multimillion history, different height and a way of education.
Instruction
1. Scientists established for a long time that mountains appear in that place where there are heavy traffics of terrestrial plates. Many millions years ago tectonic plates crawled at each other and contracted under huge pressure in huge folds, broke in cracks and breaks. Thus there were folded mountains which example are the Appalachians which lost already the initial height and the most part of the Alps.
2. Vaulted or dome-shaped mountains arose in a bit different way. These layers of rocks were curved up by the melted lava which under big pressure aspired to the Earth's surface. On such mountains it is possible to see the taken root mass of magmatic breeds today. An example of they are the Black Hills located in the American State of Dakota.
3. Whole, or as they are called still, clumpy, mountains appeared as a result of failures or breaks of earth crust. Huge blocks began to move along a break, failing inside or rising up. Thus there were Ridge Titon and a mountain chain Sierra Nevada in America.
4. Some single mountains having the beautiful conical and symmetric shape were formed in the place of a volcano. During its eruption, magma, ashes, stones and dirt accumulated on the Earth's surface. Over time the lava stiffened, forming the small hill which with each volcanic eruption became higher. The most beautiful mountain Fujiyama in Japan or Vesuvius in Italy was in this way formed. It is easy to recognize them by the cut-off top where the volcano muzzle is located.
5. Despite the seeming solidity and firmness of mountains, they tend to change and even destruction. Their soil is often washed away by water flows and a rain, and slopes collapse the frozen water. Over time even the biggest tops can turn into small hills and even plains, the truth for this purpose will be required many million years.