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      - Maestrichtian
        
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- Paleozoic
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    - Upper Cambrian
      - Bonneterre Formation (1)
      - Furongian (1)
      - Lamotte Sandstone (1)
  - Carboniferous
    - Lower Carboniferous
      - Dinantian (1)
    - Mississippian
      - Boone Formation (1)
      - Lower Mississippian
        
        Kayak Shale (9)
        
        Kekiktuk Conglomerate (6)
        
        Osagian (1)
        
        Tournaisian (1)
      - Middle Mississippian
        
        Visean (1)
      - Rampart Group (1)
      - Upper Mississippian
        
        Chesterian (2)
        
        Meramecian (2)
    - Pennsylvanian
      - Lower Pennsylvanian
        
        Morrowan (3)
      - Middle Pennsylvanian
        
        Atokan (3)
        
        Desmoinesian (1)
      - Upper Pennsylvanian (2)
    - Wahoo Limestone (5)
  - Chattanooga Shale (1)
  - Devonian
    - Lower Devonian
      - Emsian (8)
      - Gedinnian (1)
      - Lochkovian (2)
      - Oriskany Sandstone (1)
      - Pragian (2)
      - Siegenian (1)
    - Middle Devonian
      - Balaklala Rhyolite (1)
      - Copley Greenstone (1)
      - Eifelian (10)
      - Givetian (2)
    - Old Red Sandstone (2)
    - Upper Devonian
      - Famennian (2)
      - Frasnian (4)
      - Kanayut Conglomerate (4)
      - Palliser Formation (1)
  - Endicott Group (5)
  - Knox Group (1)
  - Lisburne Group (41)
  - lower Paleozoic (8)
  - middle Paleozoic (6)
  - Ordovician
    - Lower Ordovician (1)
    - Middle Ordovician
      - Darriwilian (1)
      - Llandeilian (2)
      - Llanvirnian (1)
      - Normanskill Formation (1)
      - Platteville Formation (1)
      - Whiterockian (2)
    - Upper Ordovician
      - Ashgillian (3)
      - Caradocian (3)
      - Cincinnatian (1)
      - Katian (2)
  - Permian
    - Echooka Formation (4)
    - Guadalupian (1)
    - Lower Permian
      - Cisuralian
        
        Kungurian (1)
        
        Sakmarian (1)
      - Wolfcampian (1)
    - Middle Permian (1)
  - Road River Formation (3)
  - Sauk Sequence (1)
  - Shoo Fly Complex (2)
  - Silurian
    - Lower Silurian
      - Llandovery (5)
      - Wenlock
        
        Homerian (2)
    - Middle Silurian (1)
    - Upper Silurian
      - Ludlow (4)
  - upper Paleozoic (19)
- Phanerozoic (6)
- Precambrian
  - Archean
    - Mesoarchean (1)
    - Neoarchean (2)
  - Stillwater Complex (1)
  - upper Precambrian
    - Proterozoic
      - Huronian
        
        Gowganda Formation (1)
      - Mesoproterozoic
        
        Belt Supergroup (1)
      - Neoproterozoic
        
        Cryogenian (1)
        
        Ediacaran (1)
        
        Sturtian (1)
        
        Tonian (1)
        
        Vendian (1)
      - Paleoproterozoic
        
        Hemlock Formation (1)
igneous rocks