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Primary terms
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Africa
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carbon
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Tertiary
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Pliocene
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Paleogene
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Indian Ocean
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Invertebrata
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Insecta
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Mesozoic
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Cretaceous
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Kimmeridgian
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Morrison Formation (3)
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Navajo Sandstone (3)
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Triassic
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Lower Triassic
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Permian-Triassic boundary (2)
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upper Mesozoic (1)
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Sr-87/Sr-86 (5)
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Mexico
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Pacific Ocean
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Paleozoic
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Cambrian
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Potsdam Sandstone (1)
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Carboniferous
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Upper Carboniferous (3)
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Devonian
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Old Red Sandstone (1)
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Ordovician
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Juniata Formation (1)
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Permian
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Middle Permian (3)
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Unayzah Formation (1)
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Zechstein (1)
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Pilot Shale (1)
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Silurian
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upper Paleozoic
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