One of the mysteries of the English language finally explained.
The process by which plant remains become coal.
- ‘The humic organic matter of peat is also altered on burial, water and volatiles being lost during the process of coalification.’
- ‘Depending on the degree of carbon concentration and coalification, one differentiates between lignite, bituminous coal and anthracite.’
- ‘Plant fossils of the lower Pease River Flora are preserved mainly as compressions and coalifications.’
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