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Such beds as there remain undoubtedly belong to the base of the coal-measures, and observations all go to show that the surface suffered such extreme denudation subsequent to the growth of the coal-forests, that the wealth which once lay there, has been swept away from the surface which formerly boasted of it.
The spores which fell from these cones are found flattened in the coal, and they may be seen scattered about in the coal-ball. Week 23 Another famous tree which grew in the coal-forests was the one whose roots we found in the floor or underclay of the coal.
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