Coal/Definition

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Revision as of 14:31, 1 May 2009 by imported>Milton Beychok (Revised Definition subpage to be consistent with current introductory section)
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https://en.citizendium.org/wiki/index.php?title=Coal/Definition&printable=yes
A definition or brief description of Coal.

Coal is a carbon-containing rock formed by the effect of bacteria, heat and pressure on the debris from the decay of ferns, vines, trees and other plants which flourished in swamps millions of years ago.

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