What kind of plants were buried in the ground more than 200 million years ago? 20

No, more than 200 million years ago, the main plant for coal formation was spore plants, for the following reasons:

Formation age of coal] In the whole geological time, there are three major coal-forming periods in the world: (1) In the Carboniferous and Permian of the Paleozoic Era, coal-forming plants were mainly robe plants. The main types of coal are bituminous coal and anthracite.

2) In the Mesozoic and Cretaceous, coal-forming plants were mainly gymnosperms. The main types of coal are lignite and bituminous coal. (3) In the Tertiary of the Cenozoic, coal-forming plants were mainly angiosperms.

The main type of coal is lignite, followed by peat, and some young bituminous coal.

Paleozoic Era – the third generation of geological time (the first generations are Archean and Proterozoic). It began about 100 million years ago and ended 100 million years ago.

In the whole geological time, there are three major coal-forming periods in the world: (1) In the Carboniferous and Permian of the Paleozoic Era, coal-forming plants were mainly robe plants. The main types of coal are bituminous coal and anthracite.

2) In the Mesozoic and Cretaceous, coal-forming plants were mainly gymnosperms. The main types of coal are lignite and bituminous coal. (3) In the Tertiary of the Cenozoic, coal-forming plants were mainly angiosperms.

The main type of coal is lignite, followed by peat, and some young bituminous coal.

Coal was produced by a large number of ferns in ancient times.

formed, buried in the ground undergoes complex biochemistry.

and solid flammable minerals gradually formed by physicochemical changes. Coal is the most abundant and widely distributed fossil fuel on the planet.

The main elements that make up the organic matter of coal are carbon, hydrogen, oxygen, nitrogen and sulfur, in addition, there are very small amounts of phosphorus, fluorine, chlorine and arsenic. According to the different raw materials and conditions of coal, coal in nature can be divided into three categories, namely humic coal, residual coal and saprolite.

Coal is derived from the ancient fern (jué) plant. 200 million years ago, the earth once flourished with ferns up to tens of meters high, they constituted a large forest, and later these ferns became extinct, due to the changes in the earth's crust constantly buried in the ground, isolated from the air for a long time, and under high temperature and high pressure, after a series of complex physical and chemical changes and other factors, the formation of black combustible sedimentary rock, which is coal.

Coal and oil are both non-renewable energy sources on the planet, which take thousands of years to form, and we almost cannot live without them. It is often said that coal is formed from plants and oil is formed from animal remains, is this really the case?

Coal is made from ancient ferns.

Change comes. 200 million years ago, the earth once flourished with ferns up to tens of meters high, they constituted a large forest, and later these ferns became extinct, due to the changes in the earth's crust constantly buried in the ground, isolated from the air for a long time, and under high temperature and high pressure, after a series of complex physical and chemical changes and other factors, the formation of black combustible sedimentary rock.

That's coal.

Coal is the most widely distributed fossil energy resource in the world, which is mainly divided into bituminous coal and anthracite.

Subbituminous coal and lignite.

and so on. 80% of the world's recoverable coal reserves are concentrated in China, the United States, Russia, Australia, India, Germany and other countries. Coal has a wide range of uses and can be summarized into three main uses according to the purpose for which it is used: thermal coal.

Coking coal, coal chemical industry.

Coal mainly includes coal for gasification, coal for low-temperature dry distillation, coal for hydrogenation and liquefaction, etc.

In addition to the use of coal as fuel to obtain heat and kinetic energy, it is more important to produce coke for metallurgy and artificial oil, that is, coal tar, a liquid product of low-temperature dry distillation of coal. After chemical processing, thousands of chemical products can be manufactured from coal, so it is a very important chemical raw material, such as a considerable number of small and medium-sized nitrogen fertilizer plants in China use coal as raw materials to produce fertilizers. Coal in China is widely used as a raw material for a variety of industries.

Coal mining is one of the hardest jobs, and a lot of effort is being made to improve working conditions. Due to the different burial depths of coal resources, the mining methods are generally divided into mine mining (deep burial) and open-pit mining (shallow burial).

Coal mining in China is dominated by mine mining, such as Shanxi, Shandong, Xuzhou and Northeast China.

Most of them use this mining method, but there are also open-pit mining, such as the Shuozhou Pingshuo Coal Mine, the largest open-pit coal mine in the country.

Ancient ferns.

Formation of coal: Coal is a product of the movement of the earth's crust. In the Paleozoic Era more than 300 million years ago, the Mesozoic Era more than 100 million years ago and the Cenozoic Era tens of millions of years ago, a large number of plant debris were transformed into coal after complex biochemical, geochemical and physicochemical processes.

It is generally believed that the coal-forming process is divided into two stages: the peat stage and the coalification stage. The former is mainly a biochemical process, and the latter is a physicochemical process.

Genetic classification: The genetic classification of coal excavation is mainly divided into five categories: humus coal generated by higher plants and saprolite produced by lower plants, as well as humus saprolite, saprolite and residual coal formed by the mixture of the above two types. Among them, humus coal accounts for the largest proportion of the earth, accounting for more than 95% of all coal.