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Why is there so much coal on the earth and what was it before?
Release time:
2020-04-09
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We know that coal comes from mining, so how did so much coal form underground?
We know that coal comes from mining, so how did so much coal form in the ground? Slash clues will show the line of each root plant, assuming that the cut coal block is enlarged, and then look at the shape and internal features of the plant, it will clearly appear in it, and even there are trunks and other substances left in it, Fushun is one of the most famous coal-producing areas in China.
Sometimes insect fossils are completely wrapped in them, which is of high artistic value. In fact, amber comes from yellow resin, which shows that the underground coal is not stone, but the result of plant transformation. So how long does it take to evolve before it becomes coal? The formation of coal requires a special environment, with lush trees growing everywhere during periods of frustrated climatic conditions, and the water is full of a large number of plants and animals, influenced by crustal movements and also coming to the plants that were growing.
Under the long-term stimulation of physics and chemistry, the gas and volatiles in these plants are lost, and only the carbon income among them is reduced. People call it Taihua effect. Well, this first produces a quagmire and is buried in the ground. With the continuous increase of temperature, the pressure gradually increases, and the proportion of detection is also higher and higher, which produces crane coal and anthracite coal. If you want a simple summary, then the occurrence of gelation and carbonization is the birth process of coal.
The situation of crustal operation is different and the characteristics are different. In some places, the treatment process of plants and crustal remains ventilated, and there is no gap. Thick coal seams come from this way, but there are still some areas where the speed gap is very large, and most of the coal seams formed here are relatively thin. Not after the formation of this is not fixed and unchanged, but by the long-term test of the earth, the originally stable coal seam is no longer stable to produce gaps.
Others sleep deeper and deeper underground, undetected. Rocks are distributed all over the world, some of which are hidden under a layer of sediment, and others are also hidden in waters. Outside the earth, there is a layer of lithosphere tightly wrapped. The thickest rock is as thick as 100 kilometers, which means that the rock is not only the crust, but also the upper part of the mantle.
The rocks that were initially formed, such as igneous rocks, metamorphic rocks and sedimentary rocks, are affected by various geological processes on the surface of the earth, and slowly evolve into other substances that are constantly changing in natural conditions. White clouds, these decomposition products and sediment, and eventually they gradually fall silent in relatively low terrain.
Due to the passage of time, pressure and heat act on it. Shale and sandstone formed by final condensation are examples. Many living organisms are often included in sedimentary rocks, so we will see traces of some animal remains.
The formed rocks are changed in nature by pressure and high temperature. One or some foreign substances enter, and then new types of rocks are changed. These rocks are metamorphic rocks. For example, they may have been shale. All the rocks on Earth are no more than the above three categories.
The shallow coal seams are not deep, and they are exposed to the surface under the action of various natural forces. Under the guidance of these signs, people can find them more easily. With the progress of detection technology, people have adopted more advanced detection tools, and the deep coal seam can be easily mined.
Key words:
Earth, rock, formation
