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[koh-luh-fi-key-shuh n] /ˌkoʊ lə fɪˈkeɪ ʃən/
noun, Geology
the conversion of plant material into coal by natural processes, as by diagenesis and, in some instances, metamorphism.
Origin of coalification
1910-15; coal + -i- + -fication Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for coalification
  • coalification affects not only the organic matter in coal, but the mineral matter as well.
  • Coal that has been deeply buried has undergone a higher level of coalification caused by high temperature and high pressure.
  • Methane, formed during coalification, is stored in coal seams and the surrounding strata and released during coal mining.
  • It is likely that these products are also derived from lignin, especially lignin that has been altered by coalification reactions.
  • Lignite is a coal in the early stages of coalification, with properties intermediate to those of bituminous coal and peat.
  • With an increase in degree of coalification, the percentage of volatile matter decreases and the calorific value increases.
  • Methane is formed in coal during the coalification process and also as a result of bacterial activity.
  • Coal rank indicates the progressive alteration, or coalification, from lignite to anthracite.
  • Conclusions: that start in the peat stage and continue through coalification.
  • The coalification process, whereby plant material is gradually converted to coal, generates large volumes of methane-rich gas.

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