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Quaternary
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Neogene
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Paleogene
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Cretaceous
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Jurassic
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Triassic
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Permian
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Carboniferous
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Devonian
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Silurian
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Ordovician
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Cambrian
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Ediacaran
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Cryogenian
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Tonian
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Stenian
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Ectasian
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Calymmian
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Statherian
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Orosirian
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Rhyacian
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Siderian
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Neoarchean
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Mesoarchean
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Paleoarchean
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Eoarchean