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Geological Timescale
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quaternary period and the holocene and plesoscene epochs
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quaternary and teriary periods in this era
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piloscene
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piloscene period
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miocene epoch
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oligocene
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eocene
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pliocene epoch
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cretaceous period
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jurassic period
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triassic period
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permian period
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carboniferous period
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pevonion period
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silurian period
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ordovian period
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cambrian period
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hadean period