| Depending on the degree of carbon concentration and coalification, one differentiates between lignite, bituminous coal and anthracite. |
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| The humic organic matter of peat is also altered on burial, water and volatiles being lost during the process of coalification. |
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| Three major physical factors duration, increasing temperature, and increasing pressure may influence the coalification process. |
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| The most widely accepted explanation is that coalification takes place in response to increasing temperature. |
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| The effect of increasing pressure due to depth of burial is not considered to cause coalification. |
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| Rank measures the amount of coalification, or alteration, the mineral has undergone in its formation. |
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| Since microbial activity ceases within a few metres of the Earth's surface, the coalification process must be controlled primarily by changes in physical conditions that take place with depth. |
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| If either the rate of subsidence or the rate of influx of new sediment increases, the peat will be buried and soon thereafter the coalification process geochemical coalification begins. |
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| The organic carbon content of coal increases gradually with increasing coalification degree. |
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| Ibarra JV, Munoz E, Moliner R FTIR study of the evolution of coal structure during coalification process. |
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| During coalification, peat undergoes several changes as a result of bacterial decay, compaction, heat and time. |
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| Coal rank indicates the progressive alteration, or coalification, from lignite to anthracite. |
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| This process, called coalification, concentrates the carbon content, and thus the heat content, of the material. |
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