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elements, isotopes
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fossils
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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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  - Shungura Formation (3)
  - Stone Age
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  - Tertiary
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    - Neogene
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        Columbia River Basalt Group (23)
        
        Ellensburg Formation (1)
        
        Grande Ronde Basalt (7)
        
        lower Miocene
        
        Burdigalian (1)
        
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        Paintbrush Tuff (2)
        
        Peach Springs Tuff (1)
        
        Picture Gorge Basalt (2)
        
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        upper Miocene (5)
        
        Wanapum Basalt (2)
      - Pliocene
        
        lower Pliocene (2)
        
        upper Pliocene
        
        Piacenzian (1)
    - Paleogene
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        Clarno Formation (4)
        
        lower Eocene (1)
        
        upper Eocene (2)
      - Oligocene
        
        Fish Canyon Tuff (7)
        
        upper Oligocene (2)
      - Paleocene
        
        lower Paleocene
        
        Danian (3)
        
        K-T boundary (10)
  - upper Cenozoic
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- Mesozoic
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- MIS 2 (1)
- Paleozoic
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    - Upper Ordovician
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        Borrowdale Volcanic Group (1)
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  - Permian
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  - Silurian
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  - upper Paleozoic
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- Precambrian
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  - Kingston Peak Formation (1)
  - North Shore Volcanics (2)
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  - upper Precambrian
    - Proterozoic
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      - Mesoproterozoic
        
        Gawler Range Volcanics (1)
      - Neoproterozoic
        
        Cryogenian (1)
        
        Marinoan (1)
        
        Sturtian (1)
  - Ventersdorp Supergroup (1)
igneous rocks
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    - ultramafics
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        lherzolite (1)
        
        spinel lherzolite (1)
        
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  - porphyry
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  - volcanic rocks
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    - basalts
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        alkali olivine basalt (2)
        
        hawaiite (5)
        
        mugearite (3)
        
        trachybasalts (1)
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      - flood basalts (42)
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      - olivine basalt (2)
      - olivine tholeiite (2)
      - shoshonite (6)
      - tholeiite (11)
      - tholeiitic basalt (8)
      - trap rocks (1)
    - basanite (6)
    - benmoreite (3)
    - dacites (37)
    - glasses
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      - volcanic glass (17)
    - komatiite (1)
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    - leucitite (2)
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- volcanic ash (91)
metamorphic rocks
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minerals
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        diopside (1)
        
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        sanidine (18)
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        anorthite (3)
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        opal-A (1)
      - quartz (13)
    - zeolite group (2)
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