Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Compression and hardening over long periods of time, the processes by which coal is formed from plant materials.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun geology The formation of
coal by the gradual heating and compression oforganic matter, normally viapeat
Etymologies
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Examples
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Coal is ranked as lignite, bituminous, or anthracite, depending upon energy content; with increasing coalification, moisture content decreases and carbon content increases.
Coal 2007
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The theory also explains coalification, quartzite accumulations Athabasca sands.
Should Keller's Thin Sections Be Independently Tested? « Climate Audit 2006
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During deep burial the peat undergoes coalification which squeezes out up to 98% of the water and some of the volatile hydrocarbons.
WHAT REALLY HAPPENED 2009
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During deep burial the peat undergoes coalification which squeezes out up to 98\% of the water and some of the volatile hydrocarbons.
WHAT REALLY HAPPENED 2008
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