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dec 6, 520 BC - признак начала Палеозойской эры. В многочисленных мелководных морях процветали морская флора и фауна. Особенно широко были распространены трилобиты.
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Водопьянова Олеся ЭБ17-02Б
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Олеся Водопьянова
28 Oct 2018
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dec 6, 520 BC
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~ 2548 years ago
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