Question

Why are coal mines found deep inside the earth​

Answer 1

$<p style="color:red;font-family:cursive;background :black;font-size:25px;">$The reason coal is formed deep (ambiguous) inside the earth’s crust has a lot to do with the way coal is formed.Coal is formed by accumulation of vegetative material, which due to time, pressure, and heat decompose from their complex organic molecules to form elemental carbon, hydrogen, oxygen, phosphorus, sulphur, nitrogen, and whatever else may be there. Subsequently, compounds like methane, sulphur dioxide, oxides of nitrogen, water are formed, which gradually escape the strata, but some of it also remains trapped.What is left is carbon in coal form along with some of the formed gasses trapped in the coal body.This process occurs over (~30–600) millions of years. In these millions of years, there is movement of material over the deposits, which causes the material to be part of the coal seam to move sub-surface.Hence we have coal seams forming from anywhere between 30–40 metres below sea ground to over 3 kilometres below ground.The depth at which the coal seam is found is not indicative of its age. The surface will undergo periods of deposition and periods of erosion which will result in change of depth at which the seam is found. This results in outcrops of coal also being found very close or on the surface.

Answer 2

Answer: The reason coal is formed deep (ambiguous) inside the earth’s crust has a lot to do with the way coal is formed.

Coal is formed by accumulation of vegetative material, which due to time, pressure, and heat decompose from their complex organic molecules to form elemental carbon, hydrogen, oxygen, phosphorus, sulphur, nitrogen, and whatever else may be there. Subsequently, compounds like methane, sulphur dioxide, oxides of nitrogen, water are formed, which gradually escape the strata, but some of it also remains trapped.

What is left is carbon in coal form along with some of the formed gasses trapped in the coal body.

This process occurs over (~30–600) millions of years. In these millions of years, there is movement of material over the deposits, which causes the material to be part of the coal seam to move sub-surface.

Hence we have coal seams forming from anywhere between 30–40 metres below sea ground to over 3 kilometres below ground.

The depth at which the coal seam is found is not indicative of its age. The surface will undergo periods of deposition and periods of erosion which will result in change of depth at which the seam is found. This results in outcrops of coal also being found very close or on the surface.

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