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        upper Miocene
        
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        upper Eocene
        
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        lower Turonian (5)
        
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        Tarbert Formation (1)
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        lower Kimmeridgian (3)
        
        upper Kimmeridgian (1)
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    - Upper Triassic
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        Ischigualasto Formation (1)
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      - Rhaetian
        
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  - upper Mesozoic (4)
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- Paleozoic
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  - Carboniferous
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        Cuyahoga Formation (1)
        
        Fort Payne Formation (2)
        
        Kayak Shale (1)
        
        Kinderhookian (3)
        
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        Lodgepole Formation (2)
        
        Osagian
        
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        Tournaisian
        
        upper Tournaisian (1)
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        Chesterian (5)
        
        Fayetteville Formation (2)
        
        Hartselle Sandstone (1)
        
        Mauch Chunk Formation (2)
        
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        Serpukhovian (8)
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      - Lower Pennsylvanian
        
        Bashkirian (4)
        
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        Pocahontas Formation (1)
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        Allegheny Group (3)
        
        Atokan
        
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        Carbondale Formation (1)
        
        Desmoinesian (8)
        
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        Paradox Formation (1)
        
        Staunton Formation (1)
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        Gzhelian (3)
        
        Kasimovian (5)
        
        Missourian
        
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        Virgilian
        
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  - Devonian
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    - Lower Devonian
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      - Mahantango Formation (1)
      - Marcellus Shale (12)
      - Onondaga Limestone (2)
      - Tully Limestone (2)
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    - Upper Devonian
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        lower Famennian (2)
        
        upper Famennian (3)
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        upper Frasnian (3)
      - Huron Member (1)
      - Kanayut Conglomerate (1)
      - Kellwasser event (6)
      - Ohio Shale (2)
      - Palliser Formation (1)
    - Waterways Formation (1)
  - Earn Group (1)
  - Ellis Bay Formation (1)
  - Exshaw Formation (1)
  - Hunton Group (3)
  - Itarare Subgroup (1)
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  - Knox Group (1)
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  - lower Paleozoic
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    - Penobscot Formation (2)
    - Wilmington Complex (1)
  - Maroon Formation (1)
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  - middle Paleozoic (2)
  - Minnelusa Formation (2)
  - New Albany Shale (3)
  - Ordovician
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    - Eureka Quartzite (1)
    - Gualcamayo Formation (1)
    - Lower Ordovician
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      - Beekmantown Group (1)
      - Ellenburger Group (1)
      - Fillmore Formation (1)
      - Floian (2)
      - Saint George Group (1)
      - Tremadocian (6)
    - Martinsburg Formation (1)
    - Meguma Group (1)
    - Middle Ordovician
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      - Black River Group (1)
      - Bromide Formation (1)
      - Darriwilian (3)
      - Decorah Shale (2)
      - Galena Dolomite (2)
      - Platteville Formation (1)
      - Saint Peter Sandstone (1)
      - Simpson Group (1)
    - Pogonip Group (2)
    - Trenton Group (2)
    - Upper Ordovician
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      - Caradocian (2)
      - Cincinnatian (2)
      - Hirnantian (9)
      - Katian (8)
      - Kope Formation (1)
      - Lorraine Group (1)
      - Maquoketa Formation (1)
      - Red River Formation (1)
      - Sandbian (2)
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      - Wufeng Formation (10)
    - Utica Shale (1)
    - Vinini Formation (1)
    - Viola Limestone (1)
    - Womble Shale (1)
  - Permian
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    - Cutler Formation (2)
    - Ecca Group (1)
    - Gharif Formation (1)
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      - Brushy Canyon Formation (1)
      - Capitanian (5)
      - Cherry Canyon Formation (1)
      - Roadian (3)
    - Hennessey Formation (1)
    - Kaibab Formation (1)
    - Khuff Formation (3)
    - Longtan Formation (1)
    - Lower Permian
      - Autunian (1)
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      - Cisuralian
        
        Artinskian (1)
        
        Asselian (5)
        
        Kungurian (5)
        
        Sakmarian (2)
      - Leonardian
        
        Bone Spring Limestone (1)
        
        Clear Fork Group (1)
      - Opeche Shale (1)
      - Wolfcampian (8)
    - Lyons Sandstone (8)
    - Maokou Formation (2)
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    - Newcastle Coal Measures (1)
    - Park City Formation (1)
    - Phosphoria Formation (3)
    - Rotliegendes (2)
    - Stone Corral Formation (1)
    - Upper Permian
      - Changxing Formation (3)
      - Lopingian
        
        Changhsingian (5)
        
        Wuchiapingian (1)
      - Permian-Triassic boundary (40)
      - Salado Formation (1)
      - Zechstein (2)
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      - Llandovery
        
        Aeronian (2)
        
        Rhuddanian (2)
        
        Telychian (2)
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        Homerian (1)
        
        Sheinwoodian (1)
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        Tonoloway Limestone (1)
      - Ludlow
        
        Gorstian (1)
        
        Ludfordian (2)
      - Pridoli (1)
  - Supai Formation (1)
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  - upper Paleozoic
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    - Antrim Shale (1)
    - Bakken Formation (4)
    - Dwyka Formation (1)
    - Fountain Formation (8)
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    - Shanxi Formation (3)
  - Waits River Formation (2)
  - Woodford Shale (8)
- Phanerozoic (47)
- Precambrian
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      - Hooggenoeg Formation (1)
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  - Brockman Iron Formation (6)
  - Central Rand Group (1)
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  - Gunflint Iron Formation (2)
  - Hadean (4)
  - Hamersley Group (4)
  - Johnnie Formation (2)
  - Kisseynew Complex (1)
  - Lewisian Complex (5)
  - Minas Supergroup (1)
  - Missi Group (1)
  - Nonesuch Shale (4)
  - Pahrump Series (1)
  - Pongola Supergroup (5)
  - Purcell System (1)
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  - Transvaal Supergroup (8)
  - Uinta Mountain Group (1)
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  - upper Precambrian
    - Proterozoic
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      - Great Oxidation Event (22)
      - Huronian
        
        Onaping Formation (1)
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        Copper Harbor Conglomerate (2)
      - Lewisian (4)
      - Mesoproterozoic
        
        Apache Group (1)
        
        Belt Supergroup (12)
        
        Calymmian (2)
        
        Ectasian (1)
        
        Gawler Range Volcanics (5)
        
        Helena Formation (2)
        
        Hiltaba Suite (4)
        
        Laxfordian (4)
        
        Missoula Group (2)
        
        Newland Limestone (3)
        
        Ravalli Group (1)
        
        Revett Quartzite (2)
        
        Roper Group (7)
        
        Stenian (4)
        
        Wallace Formation (1)
        
        Wumishan Formation (1)
      - Neoproterozoic
        
        Cryogenian (16)
        
        Dengying Formation (8)
        
        Doushantuo Formation (11)
        
        Ediacaran
        
        Wonoka Formation (2)
        
        Maranon Complex (1)
        
        Marinoan (14)
        
        Moinian (3)
        
        Nantuo Formation (5)
        
        Otavi Group (3)
        
        Riphean (1)
        
        Sturtian (5)
        
        Tonian (10)
        
        Torridonian (3)
        
        Vendian (10)
        
        Wilpena Group (1)
      - Oronto Group (7)
      - Paleoproterozoic
        
        Birimian (2)
        
        Francevillian (1)
        
        Rustenburg Layered Suite (1)
        
        Siderian (1)
        
        Statherian (2)
        
        Urquhart Shale (1)
        
        Virginia Formation (2)
      - Pocatello Formation (1)
      - Sinian
        
        Dengying Formation (8)
        
        Doushantuo Formation (11)
        
        Nantuo Formation (5)
        
        Wumishan Formation (1)
      - Windermere System (1)
  - Witwatersrand Supergroup (7)
  - Wyman Formation (1)
- Rhenohercynian (1)
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- Vindhyan (3)
igneous rocks
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    - pegmatite (28)
    - quartz monzonite (2)
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      - nepheline syenite (1)
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        dunite (4)
        
        harzburgite (1)
        
        lherzolite (1)
        
        spinel lherzolite (1)
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        clinopyroxenite (1)
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metamorphic rocks
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- ophiolite (19)
- turbidite (48)
meteorites
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        SNC Meteorites
        
        chassignite
        
        Chassigny Meteorite (2)
        
        nakhlite
        
        Nakhla Meteorite (1)
        
        shergottite (2)
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        CI chondrites (1)
        
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        Allende Meteorite (1)
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        H chondrites
        
        Tieschitz Meteorite (1)
        
        L chondrites (1)
minerals
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- minerals (22)
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        coffinite (2)
        
        zircon (183)
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        gehlenite (2)
        
        melilite (2)
  - ring silicates
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Primary terms
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