• Palaeozoic

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      espadmin

The geological era comprising the Devonian Period (Lower Palaeozoic Era) and the Carboniferous and Permian Periods (Upper Palaeozoic Era) – when used in terms of coal deposits, the mean age of the coal is 380M years (Devonian), 300M years (Carboniferous) or 245M years (Permian)

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