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20-09-2018
Biology

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The ______ period encompasses the time from 505 to 440 million years ago

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swansonalake swansonalake

29-09-2018

The Ordovician (505-440 million years ago ) is the second earliest geologic period of Paleozoic Era. It lasted for 41.2 million years and it is named after a Celtic tribe.

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