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geochronology methods
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geologic age
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        Weichselian
        
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        Wisconsinan
        
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    - upper Quaternary (10)
  - Tertiary
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        lower Miocene (1)
        
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- Mesozoic
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- Paleozoic
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igneous rocks
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Primary terms
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- Africa
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- atmosphere (4)
- Australasia
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- bacteria
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- Canada
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- carbon
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- Cenozoic
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        Weichselian
        
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        Wisconsinan
        
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  - Tertiary
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        Columbia River Basalt Group (1)
        
        Ellensburg Formation (1)
        
        Frenchman Springs Member (1)
        
        lower Miocene (1)
        
        middle Miocene (2)
        
        Saddle Mountains Basalt (1)
        
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- Europe
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