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EncyclopediaCarboniferous periodCarboniferous period (kärbunif'urus) [key], fifth period of the Paleozoic era of geologic time (see Geologic Timescale, table), from 350 to 290 million years ago. Sections in this article: The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved. More on Carboniferous period from Infoplease:
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