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commodities
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elements, isotopes
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- isotope ratios (114)
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  - stable isotopes
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    - C-13/C-12 (73)
    - D/H (8)
    - deuterium (2)
    - He-4 (1)
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    - Kr-84 (1)
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    - O-18/O-16 (64)
    - Os-188/Os-187 (4)
    - Pb-206/Pb-204 (4)
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    - Rb-87/Sr-86 (1)
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    - S-34/S-32 (26)
    - Sm-147/Nd-144 (3)
    - Sr-87/Sr-86 (27)
- large-ion lithophile elements (1)
- Lu/Hf (1)
- metals
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      - Sr-87/Sr-86 (27)
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    - Pb-208/Pb-206 (2)
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    - platinum ores (2)
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      - Sm-147/Nd-144 (3)
    - samarium
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    - scandium (1)
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- nitrogen
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- noble gases
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  - helium
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  - neon
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- oxygen
  - O-18/O-16 (64)
- phosphorus (5)
- silicon (3)
- sulfur
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- trace metals (3)
fossils
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- borings (5)
- burrows (14)
- Chordata
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      - Osteichthyes
        
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        Sarcopterygii
        
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      - Placodermi
        
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    - Tetrapoda
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      - Mammalia
        
        Theria
        
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        Perissodactyla
        
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      - Reptilia
        
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        Archosauria
        
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        Saurischia
        
        Theropoda
        
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        Synapsida
        
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- ichnofossils
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- Invertebrata
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        Ostracoda
        
        Myodocopida
        
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        Paleocopida (2)
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        Phacopida
        
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        Ptychopariida
        
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        Spiriferidina
        
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        Tabulata (4)
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        Tentaculites (2)
  - Porifera
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- Plantae
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      - Chlorophyceae
        
        Dasycladaceae (1)
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    - Phaeophyta (1)
  - Pteridophyta
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      - Archaeopteris (5)
    - Lycopsida (4)
  - Spermatophyta
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      - Coniferales (1)
- problematic fossils
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- thallophytes (10)
- tracks (1)
- trails (1)
geochronology methods
- Ar/Ar (20)
- fission-track dating (1)
- K/Ar (2)
- Lu/Hf (1)
- Nd/Nd (1)
- paleomagnetism (27)
- Pb/Pb (4)
- Rb/Sr (10)
- Re/Os (7)
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- thermochronology (3)
- U/Pb (64)
geologic age
- Cenozoic
  - Quaternary
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    - Pleistocene
      - upper Pleistocene
        
        Wisconsinan (1)
  - Tertiary
    - Maikop Series (1)
    - middle Tertiary (1)
    - Neogene
      - Miocene
        
        middle Miocene (2)
      - Pliocene (2)
    - Paleogene
      - Eocene
        
        Absaroka Supergroup (1)
        
        Green River Formation (1)
        
        lower Eocene (1)
        
        upper Eocene (3)
      - Oligocene (1)
      - Paleocene
        
        lower Paleocene
        
        K-T boundary (5)
- Dalradian (1)
- Mesozoic
  - Cretaceous
    - Blairmore Group (1)
    - Colorado Group (3)
    - Lower Cretaceous
      - Albian (1)
      - Aptian (1)
      - Barremian (1)
      - Berriasian (1)
      - Clearwater Formation (1)
      - Cupido Formation (1)
      - Mannville Group (8)
      - McMurray Formation (3)
      - Muddy Sandstone (1)
      - Neocomian (1)
      - Valanginian (1)
    - Upper Cretaceous
      - Belle Fourche Shale (1)
      - Belly River Formation (1)
      - Cardium Formation (3)
      - Carlile Shale (1)
      - Cenomanian
        
        lower Cenomanian (1)
      - Eagle Sandstone (1)
      - Ferron Sandstone Member (1)
      - Greenhorn Limestone (1)
      - Gulfian
        
        Eagle Ford Formation (2)
      - Judith River Formation (1)
      - K-T boundary (5)
      - Lewis Shale (2)
      - Maestrichtian (1)
      - Milk River Formation (1)
      - Niobrara Formation (2)
      - Senonian (1)
      - Turonian (1)
    - Viking Formation (4)
  - Jurassic
    - Fernie Formation (2)
    - Lower Jurassic
      - Nordegg Member (1)
      - Toarcian (1)
    - Middle Jurassic
      - Callovian (1)
    - Upper Jurassic
      - Arab Formation (1)
      - Fulmar Formation (1)
      - Haynesville Formation (1)
      - Smackover Formation (2)
  - Triassic
    - Lower Triassic
      - Dinwoody Formation (1)
      - Permian-Triassic boundary (2)
      - Smithian (1)
      - Spathian (1)
    - Middle Triassic
      - Anisian (1)
      - Doig Formation (3)
    - Montney Formation (7)
    - Shublik Formation (1)
    - Upper Triassic
      - Norian (2)
      - Sag River Sandstone (1)
  - Vaca Muerta Formation (1)
- Paleozoic
  - Bedford Shale (8)
  - Berea Sandstone (15)
  - Cambrian
    - Acadian (1)
    - Conasauga Group (1)
    - Lower Cambrian (6)
    - Middle Cambrian
      - Flathead Sandstone (2)
    - Upper Cambrian (1)
  - Carboniferous
    - Albert Formation (4)
    - Amsden Formation (1)
    - Culm (1)
    - Lower Carboniferous
      - Dinantian (46)
    - Mississippian
      - Barnett Shale (3)
      - Boone Formation (1)
      - Chainman Shale (1)
      - Lower Mississippian
        
        Cuyahoga Formation (1)
        
        Fort Payne Formation (1)
        
        Kayak Shale (3)
        
        Kekiktuk Conglomerate (1)
        
        Kinderhookian
        
        Banff Formation (10)
        
        Lodgepole Formation (6)
        
        Osagian
        
        Burlington Limestone (1)
        
        Pocono Formation (5)
        
        Tournaisian
        
        upper Tournaisian (1)
      - Madison Group (5)
      - Middle Mississippian
        
        Visean
        
        upper Visean (2)
      - Mission Canyon Limestone (4)
      - Price Formation (2)
      - Sunbury Shale (10)
      - Upper Mississippian
        
        Chesterian (2)
        
        Fayetteville Formation (2)
        
        Greenbrier Limestone (1)
        
        Meramecian
        
        Sainte Genevieve Limestone (1)
        
        Serpukhovian (2)
    - Pennsylvanian
      - Middle Pennsylvanian
        
        Allegheny Group (1)
        
        Moscovian (1)
      - Upper Pennsylvanian (2)
    - Silesian (1)
    - Upper Carboniferous
      - Uralian (1)
      - Westphalian (3)
  - Catskill Formation (18)
  - Chattanooga Shale (10)
  - Devonian
    - Beaverhill Lake Group (9)
    - Cedar City Formation (1)
    - Fisset Brook Formation (1)
    - Genesee Group (6)
    - Guilmette Formation (5)
    - Heemskirk Granite (1)
    - Keg River Formation (4)
    - Lower Devonian
      - Emsian (6)
      - Gedinnian (1)
      - Lochkovian (3)
      - Oriskany Sandstone (4)
      - Pragian (3)
      - Siegenian (1)
    - Middle Devonian
      - Cedar Valley Formation (2)
      - Columbus Limestone (2)
      - Delaware Limestone (2)
      - Detroit River Group (1)
      - Eifelian (8)
      - Elk Point Group (2)
      - Givetian (43)
      - Hamilton Group (3)
      - Jeffersonville Limestone (2)
      - Mahantango Formation (3)
      - Marcellus Shale (14)
      - Moscow Formation (1)
      - Onondaga Limestone (5)
      - Prairie Evaporite (2)
      - Tioga Bentonite (2)
      - Tully Limestone (5)
      - Winnipegosis Formation (5)
    - Miette Complex (3)
    - Millboro Shale (1)
    - Old Red Sandstone (6)
    - Popovich Formation (1)
    - Slave Point Formation (2)
    - Swan Hills Formation (11)
    - Traverse Group (1)
    - Upper Devonian
      - Birdbear Formation (6)
      - Brallier Shale (9)
      - Canadaway Group (5)
      - Chemung Formation (13)
      - Cleveland Member (11)
      - Domanik Formation (8)
      - Duperow Formation (19)
      - Famennian
        
        lower Famennian (10)
        
        upper Famennian (11)
        
        Wabamun Group (26)
      - Frasnian
        
        Leduc Formation (45)
        
        lower Frasnian (2)
        
        upper Frasnian (10)
      - Grosmont Formation (28)
      - Hampshire Formation (7)
      - Huron Member (17)
      - Jefferson Group (12)
      - Kanayut Conglomerate (4)
      - Kellwasser event (16)
      - Lime Creek Formation (6)
      - Nisku Formation (36)
      - Ohio Shale (41)
      - Olentangy Shale (6)
      - Palliser Formation (15)
      - Perry Formation (6)
      - Sonyea Group (7)
      - Strunian (2)
      - West Falls Formation (5)
    - Upper Old Red Sandstone (1)
    - Waterways Formation (5)
  - Earn Group (7)
  - Endicott Group (1)
  - Exshaw Formation (19)
  - Geirud Formation (1)
  - Helderberg Group (1)
  - Horton Group (3)
  - Hunton Group (3)
  - Knox Group (2)
  - Lisburne Group (4)
  - lower Paleozoic
    - Rose Run Sandstone (1)
  - middle Paleozoic (7)
  - Minnelusa Formation (1)
  - New Albany Shale (33)
  - Ordovician
    - Lower Ordovician
      - Arenigian (1)
      - Beekmantown Group (1)
      - Manitou Formation (1)
      - Tremadocian (1)
    - Meguma Group (7)
    - Middle Ordovician
      - Black River Group (2)
      - Llanvirnian (1)
      - Saint Peter Sandstone (1)
    - Montoya Group (1)
    - Trenton Group (4)
    - Upper Ordovician
      - Ashgillian (2)
      - Bighorn Dolomite (3)
      - Juniata Formation (1)
      - Red River Formation (3)
      - Reedsville Formation (1)
      - Trentonian (3)
    - Utica Shale (2)
  - Permian
    - Echooka Formation (1)
    - Guadalupian
      - Capitanian (1)
    - Khuff Formation (1)
    - Lower Permian
      - Cisuralian
        
        Sakmarian (1)
      - Leonardian (1)
      - Wolfcampian (1)
    - Phosphoria Formation (1)
    - Rotliegendes (1)
    - Upper Permian
      - Permian-Triassic boundary (2)
      - Zechstein (1)
  - Pilot Shale (3)
  - Sauk Sequence (1)
  - Shoo Fly Complex (2)
  - Silurian
    - Lower Silurian
      - Llandovery
        
        Interlake Formation (2)
      - Tuscarora Formation (1)
      - Wenlock (2)
    - Middle Silurian
      - Clinton Group (1)
      - Roberts Mountains Formation (1)
      - Waldron Shale (1)
    - Upper Silurian
      - Ludlow (1)
      - Salina Group (1)
  - Tippecanoe Sequence (1)
  - upper Paleozoic
    - Antrim Shale (10)
    - Bakken Formation (24)
    - Kaskaskia Sequence (4)
  - Woodford Shale (20)
- Phanerozoic (8)
- Precambrian
  - Archean
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    - Neoarchean (2)
  - Hecla Hoek Formation (1)
  - upper Precambrian
    - Proterozoic
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        Belt Supergroup (1)
      - Neoproterozoic
        
        Dengying Formation (1)
        
        Ediacaran (1)
        
        Tonian (1)
        
        Vendian (3)
      - Paleoproterozoic (3)
      - Sinian
        
        Dengying Formation (1)
- Rhenohercynian (1)
- Saxothuringian (1)
igneous rocks
- igneous rocks
  - carbonatites (2)
  - hypabyssal rocks (1)
  - kimberlite (1)
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  - plutonic rocks
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      - tholeiitic dolerite (1)
    - diorites
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      - tonalite (1)
    - gabbros (6)
    - granites
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      - A-type granites (4)
      - charnockite (1)
      - granite porphyry (2)
      - I-type granites (2)
      - leucogranite (4)
      - monzogranite (5)
      - rapakivi (2)
      - S-type granites (1)
    - granodiorites (10)
    - lamprophyres (6)
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    - ultramafics
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  - porphyry (2)
  - volcanic rocks
    - andesites (2)
    - basalts
      - flood basalts (1)
      - mid-ocean ridge basalts (2)
      - shoshonite (1)
    - dacites (1)
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    - pyroclastics
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      - tuff (4)
    - rhyolites (5)
    - trachyandesites
      - absarokite (1)
- ophiolite (1)
- volcanic ash (1)
metamorphic rocks
- K-bentonite (1)
- metabentonite (2)
- metamorphic rocks
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  - granulites
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  - metaigneous rocks
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    - metabasite (1)
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    - greisen (4)
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  - schists
    - glaucophane schist (1)
- ophiolite (1)
- turbidite (16)
meteorites
- meteorites
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        L chondrites (1)
minerals
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- arsenides
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- carbonates
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  - calcite (19)
  - dolomite (27)
  - magnesian calcite (1)
  - siderite (2)
- halides
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    - halite (2)
  - fluorides
    - fluorite (3)
- K-bentonite (1)
- metabentonite (2)
- minerals (1)
- native elements (1)
- oxides
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  - hematite (3)
  - hoegbomite (1)
  - ilmenite (1)
  - iron oxides (2)
  - magnetite (3)