Which Rock Burns or Melt at High Enough Temperatures?

Do you know which rock burns or melt? All rocks will eventfully burn or melt at high enough temperatures. The rock we are referring to burns at quite low temperatures and provide us with many chemicals. It can be very soft and crumbly or quite hard; it can be shiny or quite dull.

It can burn in its natural state or it can be treated so that it burns without smoke; it is usually black. Of course, the rock is coal! Like oil, coal is often regarded as the mineral, although as you will see, it also has living origins.

Certain parts of the world, such as the bogs of Scotland and Ireland, the American swamps and places Burma are water-logged. Plants that live there do not decay in the normal way when they die.

The bacteria and fungi  which  break down the plant remain under more normal conditions, cannot live because there is not enough oxygen  and certain acid are formed which kill them.

Under these circumstances, jelly-like humus is formed and this soaks into the fragments of wood and bark and so on, to form a material called peat.

Which Rock Burns or Melt

Coal is deposited as one of a sequence of sedimentary events and the rocks that occur above and below a coal seam, together with the contained fossils, indicate the conditions of depositions in the cyclic sequence.

Peat is rich in carbon, and the chemical reactions which occur also produce marsh gas or methane which bunts very readily. Methane is the natural gas which is piped into most of your homes.

In more remote places, such as the northwest of Scotland, where peat is still being formed, it that it can be used for fires during the long, cold winter.

Which Rock Burns or Melt at High Enough Temperatures?

Coal can be mined by tunneling underground or by digging huge. open pits. these pits are called open cast mines.

As the peat builds up year after year, the water is squeezed out, and then with further burying underclays and sands, it undergoes a change. It becomes more and more compacted and the gasses are pressed out.

It becomes harder and richer in carbon until eventually, it forms a brown coal. It has  often  been  shown  in coal fields that the  greater the  thickness  of rock on  top  of the coal, the higher  the carbon content of the coal. Eventually, anthracite results which contain about 95 percent carbon and is a very high quality and expensive coal.

Which Rock Burns or Melt

This was how an eighteenth-century naturalist represented the coal seams of Somerset, England.

Most of the coal fields throughout the world are to be found in rocks of carboniferous age. About  300 million  years ago, dense  swampy forests  occurred  because  of the very  rich  plant life  which had by then  developed on Earth, and it  is the remains of these forests that gives  us most of our coal.

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