Carboniferous


Concise Oxford English Dictionary © 2008 Oxford University Press:
Carboniferous /ˌkɑːbəˈnɪf(ə)rəs/
adjective Geology relating to or denoting the fifth period of the Palaeozoic era (between the Devonian and Permian periods, about 363 to 290 million years ago), a time when extensive coal-bearing strata were formed.
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