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elements, isotopes
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geochronology methods
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geologic age
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        Bootlegger Cove Formation (1)
        
        Devensian
        
        upper Devensian (2)
        
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        Weichselian
        
        upper Weichselian
        
        Younger Dryas (4)
        
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        upper Wisconsinan (2)
        
        Wurm (1)
      - Wedron Formation (1)
    - upper Quaternary
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  - Tertiary
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    - Neogene
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      - Miocene
        
        Columbia River Basalt Group (3)
        
        Grande Ronde Basalt (2)
        
        lower Miocene (1)
        
        middle Miocene
        
        Langhian (1)
        
        Saddle Mountains Basalt (1)
        
        upper Miocene
        
        Mount Messenger Formation (1)
        
        Tortonian (2)
      - Pliocene
        
        Dacian (1)
        
        lower Pliocene (1)
        
        upper Pliocene
        
        Akchagylian (1)
    - Paleogene
      - Eocene
        
        lower Eocene
        
        Cuisian (1)
        
        Hatchetigbee Formation (1)
        
        Thebes Formation (1)
        
        Ypresian
        
        London Clay (9)
        
        middle Eocene
        
        Barton Clay (1)
        
        Bartonian (1)
        
        Lutetian (1)
        
        upper Eocene (4)
      - Oligocene
        
        Boom Clay (4)
        
        Frio Formation (4)
        
        lower Oligocene (2)
      - Paleocene
        
        Clayton Formation (1)
        
        lower Paleocene
        
        Danian (5)
        
        K-T boundary (9)
      - Paleocene-Eocene Thermal Maximum (1)
      - Waikato Coal Measures (1)
      - Wilcox Group (1)
    - Shahejie Formation (1)
    - upper Tertiary (1)
  - Tulare Formation (1)
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- Coal Measures (2)
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- Mesozoic
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    - Lower Cretaceous
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      - Mannville Group (2)
      - McMurray Formation (1)
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    - Upper Cretaceous
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      - Campanian (3)
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      - Frontier Formation (2)
      - Greenhorn Limestone (1)
      - Gulfian
        
        Eagle Ford Formation (4)
      - Hell Creek Formation (1)
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      - K-T boundary (9)
      - Ladd Formation (1)
      - Maestrichtian
        
        upper Maestrichtian (2)
      - Magothy Formation (2)
      - Marshalltown Formation (1)
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    - Viking Formation (1)
  - Jurassic
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      - Toarcian
        
        lower Toarcian (1)
      - upper Liassic (2)
    - Middle Jurassic
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        Brent Group (1)
        
        Ness Formation (1)
      - Bathonian (1)
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      - Dogger (1)
    - Opalinus Clay (3)
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    - Upper Jurassic
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      - Entrada Sandstone (1)
      - Haynesville Formation (4)
      - Kimmeridge Clay (5)
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      - Stump Formation (1)
  - Moenave Formation (1)
  - Nugget Sandstone (2)
  - Triassic
    - Lower Triassic
      - Dinwoody Formation (1)
      - Panchet Series (1)
      - Permian-Triassic boundary (1)
    - Middle Triassic
      - Ladinian (1)
    - Upper Triassic
      - Mercia Mudstone (2)
      - Rhaetian (1)
      - Yanchang Formation (1)
- MIS 5 (2)
- Paleozoic
  - Berea Sandstone (2)
  - Cambrian
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    - Upper Cambrian
      - Wilberns Formation (1)
  - Carboniferous
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      - Dinantian (1)
    - Mississippian
      - Barnett Shale (3)
      - Lower Mississippian
        
        Kinderhookian (1)
        
        Lodgepole Formation (1)
      - Madison Group (2)
      - Middle Mississippian
        
        Visean (1)
    - Pennsylvanian
      - Lower Pennsylvanian
        
        Morrowan (1)
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        Desmoinesian
        
        Cherokee Group (1)
      - Morrow Formation (1)
      - Pottsville Group (2)
  - Devonian
    - Middle Devonian
      - Marcellus Shale (1)
    - Old Red Sandstone (2)
    - Upper Devonian
      - Frasnian (1)
  - lower Paleozoic (2)
  - Ordovician
    - Middle Ordovician
      - Bromide Formation (1)
    - Upper Ordovician
      - Bighorn Dolomite (1)
      - Caradocian
        
        Borrowdale Volcanic Group (1)
  - Permian
    - Gharif Formation (1)
    - Lower Permian
      - Cisuralian
        
        Kungurian (1)
      - Leonardian
        
        Bone Spring Limestone (1)
      - Wolfcampian (1)
    - Phosphoria Formation (1)
    - Upper Permian
      - Permian-Triassic boundary (1)
  - Silurian
    - Lower Silurian
      - Grimsby Sandstone (1)
      - Wenlock (1)
    - Middle Silurian
      - Clinton Group (1)
    - Upper Silurian
      - Ludlow (1)
  - Taiyuan Formation (1)
  - upper Paleozoic
    - Bakken Formation (1)
    - Shanxi Formation (1)
  - Woodford Shale (1)
- Precambrian
  - Adirondack Anorthosite (1)
  - Archean
    - Neoarchean (1)
  - upper Precambrian
    - Proterozoic
      - Lewisian (1)
      - Malmani Subgroup (1)
      - Neoproterozoic
        
        Ediacaran (2)
        
        Torridonian (1)
igneous rocks
- igneous rocks
  - plutonic rocks
    - anorthosite (1)
    - diabase (2)
    - granites
      - aplite (1)
    - granodiorites (1)
    - pegmatite (1)
    - ultramafics
      - peridotites (1)
  - volcanic rocks
    - andesites (2)
    - basalts
      - tholeiite (1)
      - trap rocks (1)
    - glasses
      - palagonite (1)
      - volcanic glass (1)
    - nephelinite (1)
    - pyroclastics
      - hyaloclastite (1)
      - ignimbrite (3)
      - tuff (7)
    - rhyolites (1)
- ophiolite (3)
- volcanic ash (2)
metamorphic rocks
- metamorphic rocks
  - cataclasites (1)
  - gneisses (2)
  - metaigneous rocks
    - serpentinite (2)
  - metasedimentary rocks (1)
  - metasomatic rocks
    - serpentinite (2)
  - phyllites (1)
  - schists
    - greenstone (1)
  - slates (2)
- ophiolite (3)
- turbidite (12)
minerals
- alloys
  - carbides (1)
- carbonates
  - ankerite (1)