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thời gian > geological time (en) > Palaeozoic (en) > Silurian (en)

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DEFINITION

  • The Silurian is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at 443.8 million years ago (Mya), to the beginning of the Devonian Period, 419.2 Mya.

    Source: https://en.wikipedia.org/wiki/Silurian.

    Created: 1/20/21

    (en)

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http://aims.fao.org/aos/agrovoc/c_1c2ea364

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