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Noun: Carboniferous period
  1. The geological period from about 359 million to 299 million years ago, characterized by extensive coal formations
    "Many coal deposits were formed during the Carboniferous period";
    - Carboniferous

Type of: geological period, period

Part of: Palaeozoic [Brit, Cdn], Paleozoic, Paleozoic era

Encyclopedia: Carboniferous period