How Is Coal Formed?
Coal already formed long passes through a wide range of ages in the history of our Earth, in the time of the greatest in the history of the formation of coal is a period of Pensilvania, which started 250 million years ago and lasts approximately 35 million years old.
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most of the coal was formed in the period between 100 million to 1 billion years ago, what has happened during that period and how it was coal formed? the coal in the ground in the form of horizontal layers miles extent.
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sometimes up to more than 10 feet thick, the layer of rocks between tucked coal, coal is a former relic trees and herbs from ancient times, which grows in the swampy forest in the middle of the climate hot and humid air over a period of hundreds of years ago.
around the marshy places, there is a vast area of overgrown grass and trees purun figure, in time the grass and trees are dying and buried water goes into a quiet swamp it.
therefore, the grass and trees were submerged in the water, then they are protected from rapid decay if compared to their state if located on the mainland and open to the air.
bacteria's change some part of the stems of grasses and trees it into gas, which pops out, left behind was a mixture of black substance, most of which is carbon, which became the forerunner of coal formed.
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because of the process of accumulation of grass and trees rot it lasted millions of years, then of course the layer that reaches a height of several feet, but, sooner or later, the process is coming to an end as well. the deposition process of occurred because the skin of the Earth from it surface.
and this resulted in the formation of a thick layer of mud, while the sand is brought into the float up to the top of the surface layer of vegetation that has been rotting it.
at one time pressures spreading from mud and sand located, it was somewhat fluid which largely exist underneath it, so that the liquid that oozes out, the a thick layer of left behind material like mud, which gradually becomes louder and changed coal.
this process happens repeatedly in some place, because of the layers of sedimentary rocks formed up to near the surface of the water, then making the area a new swamp, then back again formed a layer of vegetation surrounding it, then sank again and infuse.
this way then it is making a separate place, while coal from other regions because of the obstacles of mud and sand, which in turn also turned into stones.
changes the former vegetation to become the stones take up to thousands of years, but evidence that be rocks were derived from the former relic plants we can see easily.
sometimes even still we can find trees figure in its whole in the middle years of coal, or the pattern of a tree bark, or even fossils of woody stems clearly visible in coal.
changes the former vegetation to become the stones take up to thousands of years, but evidence that the rocks were derived from the former relic plants we can see easily.
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