The Ectasian period was the second period in the Mesoproterozoic era and lasted from 1.4bya to 1.2bya. During this time platform covers expanded and green algae colonies formed in the seas.
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The Ectasian period was the second period in the Mesoproterozoic era and lasted from 1.4bya to 1.2bya. During this time platform covers expanded and green algae colonies formed in the seas.