| http://www.w3.org/ns/prov#value | - Here, trees and other plants grew abundantly They produced a great accumulation of fallen leaves, twigs, branches and trunks These settled to the bottom of the swamps Stagnant water preserved the dead plant material from decay This accumulation is called peat That is the first step in coal formation Rivers then overflowed into swamps This buried the peat under thick layers of mud/sand The peat was
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