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geologic age
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        Fayetteville Formation (1)
        
        Meramecian
        
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        Warsaw Formation (1)
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        Atokan
        
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        Desmoinesian
        
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  - Permian
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    - Lower Permian
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        Williamsport Sandstone (1)
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  - upper Paleozoic
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  - upper Precambrian
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igneous rocks
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minerals
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Primary terms
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- Africa
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        lower Pliocene (1)
    - Paleogene
      - Eocene
        
        Avon Park Formation (1)
        
        Colton Formation (1)
        
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        lower Eocene (3)
        
        middle Eocene
        
        Claiborne Group (1)
        
        Sparta Sand (1)
        
        upper Eocene (3)
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      - Oligocene
        
        Frio Formation (1)
        
        Vicksburg Group (1)
      - Paleocene
        
        Tongue River Member (1)
        
        Tullock Member (1)
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