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        Calvert Formation (1)
        
        Columbia River Basalt Group (2)
        
        Guantao Formation (4)
        
        lower Miocene
        
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        middle Miocene
        
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        Choptank Formation (1)
        
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        Mizunami Group (1)
        
        Paintbrush Tuff (2)
        
        Pebas Formation (1)
        
        Pungo River Formation (1)
        
        Saint Marys Formation (1)
        
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        Stevens Sandstone (1)
        
        Surma Group (2)
        
        upper Miocene
        
        Baynunah Formation (1)
        
        Chinji Formation (1)
        
        Chiquimil Formation (1)
        
        Eastover Formation (1)
        
        Messinian
        
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        lower Pliocene (9)
        
        upper Pliocene
        
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        Yorktown Formation (1)
      - upper Neogene (4)
    - Paleogene
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        Annot Sandstone (1)
        
        Avon Park Formation (1)
        
        Bracklesham Group (3)
        
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        Golden Valley Formation (1)
        
        Green River Formation (12)
        
        Lake Uinta (2)
        
        lower Eocene
        
        Aquia Formation (2)
        
        Willwood Formation (5)
        
        Wind River Formation (1)
        
        Ypresian
        
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        middle Eocene
        
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        Carrizo Sand (1)
        
        Claiborne Group (3)
        
        Cockfield Formation (1)
        
        Lutetian (2)
        
        Tallahatta Formation (1)
        
        Yegua Formation (1)
        
        Mirador Formation (3)
        
        Nanjemoy Formation (1)
        
        Parachute Creek Member (1)
        
        upper Eocene
        
        Chadronian (1)
        
        Jackson Group (1)
        
        Moodys Branch Formation (1)
        
        Priabonian (3)
        
        Uinta Formation (1)
        
        Werillup Formation (1)
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      - lower Paleogene (4)
      - Oligocene
        
        Boom Clay (2)
        
        Fontainebleau Sandstone (8)
        
        Frio Formation (8)
        
        Hemlock Conglomerate (1)
        
        lower Oligocene
        
        Rupelian (2)
        
        middle Oligocene (4)
        
        upper Oligocene
        
        Chattian (3)
        
        Vicksburg Group (4)
      - Paleocene
        
        Clayton Formation (1)
        
        lower Paleocene
        
        Danian (8)
        
        K-T boundary (8)
        
        middle Paleocene
        
        Selandian (1)
        
        Nacimiento Formation (1)
        
        Porters Creek Formation (1)
        
        upper Paleocene
        
        Thanetian (5)
      - Paleocene-Eocene Thermal Maximum (7)
      - Refugian (1)
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      - Sespe Formation (2)
      - Tyonek Formation (1)
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    - Pirabas Formation (1)
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    - upper Tertiary (2)
  - upper Cenozoic
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- Laurentide ice sheet (6)
- Mesozoic
  - Cretaceous
    - Bahariya Formation (2)
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      - Pearsall Formation (2)
      - Rodessa Formation (2)
      - Travis Peak Formation (4)
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    - Dakota Formation (3)
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    - Lower Cretaceous
      - Agrio Formation (1)
      - Albian
        
        lower Albian (1)
        
        Pinda Formation (1)
        
        upper Albian (2)
      - Aptian
        
        Shuaiba Formation (4)
      - Barremian (11)
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      - Bluesky Formation (1)
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      - Cedar Mountain Formation (3)
      - Clearwater Formation (3)
      - Crato Formation (1)
      - Edwards Formation (3)
      - Fredericksburg Group (1)
      - Georgetown Formation (1)
      - Gething Formation (1)
      - Glen Rose Formation (3)
      - Hauterivian (1)
      - Lagoa Feia Formation (2)
      - Mannville Group (7)
      - McMurray Formation (6)
      - Missisauga Formation (1)
      - Mowry Shale (2)
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      - Mural Limestone (1)
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      - Pearsall Formation (2)
      - Rodessa Formation (2)
      - Skull Creek Shale (1)
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      - Spirit River Formation (1)
      - Thamama Group (1)
      - Torok Formation (2)
      - Travis Peak Formation (4)
      - Trinity Group (1)
      - Valanginian (6)
      - Wealden (3)
      - Yingcheng Formation (1)
    - Lower Greensand (2)
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    - Middle Cretaceous
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    - Qingshankou Formation (1)
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    - Upper Cretaceous
      - Almond Formation (2)
      - Bearpaw Formation (4)
      - Belle Fourche Shale (1)
      - Belly River Formation (4)
      - Blackhawk Formation (3)
      - Buda Limestone (1)
      - Campanian
        
        Dinosaur Park Formation (2)
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      - Carlile Shale (1)
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      - Cenomanian
        
        Dunvegan Formation (1)
        
        lower Cenomanian (1)
      - Cody Shale (1)
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      - Djadokhta Formation (2)
      - Duwi Formation (1)
      - Eagle Sandstone (2)
      - Eutaw Formation (3)
      - Ferron Sandstone Member (4)
      - Fort Hays Limestone Member (1)
      - Fox Hills Formation (1)
      - Frontier Formation (4)
      - Fruitland Formation (1)
      - Gallup Sandstone (1)
      - Ghareb Formation (1)
      - Greenhorn Limestone (1)
      - Gulfian
        
        Austin Chalk (1)
        
        Austin Group (2)
        
        Eagle Ford Formation (11)
      - Hell Creek Formation (5)
      - Horseshoe Canyon Formation (5)
      - Javelina Formation (2)
      - Judith River Formation (4)
      - Kaiparowits Formation (2)
      - Kirtland Shale (1)
      - K-T boundary (8)
      - Lameta Formation (1)
      - Lewis Shale (2)
      - Maestrichtian
        
        lower Maestrichtian (1)
        
        upper Maestrichtian (3)
      - Marilia Formation (2)
      - Mesaverde Group (4)
      - Middendorf Formation (1)
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      - Moreno Formation (1)
      - Neuquen Group (3)
      - Niobrara Formation (4)
      - Oldman Formation (1)
      - Pictured Cliffs Sandstone (1)
      - Pierre Shale (5)
      - Point Lookout Sandstone (1)
      - Ripley Formation (1)
      - Santonian (10)
      - Senonian (19)
      - Shannon Sandstone Member (2)
      - Smoky Hill Chalk Member (1)
      - Straight Cliffs Formation (2)
      - Tropic Shale (1)
      - Turonian
        
        middle Turonian (2)
        
        upper Turonian (1)
      - Tuscaloosa Formation (7)
      - Two Medicine Formation (2)
      - Vivian Formation (1)
      - Wahweap Formation (2)
      - Williams Fork Formation (2)
    - Viking Formation (6)
    - Weald Clay (1)
    - Whitemud Formation (1)
  - Franciscan Complex (1)
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  - Great Valley Sequence (2)
  - Jurassic
    - Aztec Sandstone (4)
    - Bazhenov Formation (1)
    - Carmel Formation (4)
    - Clarens Formation (1)
    - Fernie Formation (1)
    - Ferrar Group (2)
    - Heather Formation (2)
    - Kirkpatrick Basalt (1)
    - Lower Jurassic
      - East Berlin Formation (1)
      - Hettangian (5)
      - lower Liassic (3)
      - middle Liassic (1)
      - Pliensbachian (6)
      - Portland Formation (2)
      - Sinemurian (6)
      - Sunrise Formation (1)
      - Toarcian (7)
      - upper Liassic (4)
    - Middle Jurassic
      - Aalenian (1)
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        Brent Group (12)
        
        Ness Formation (2)
      - Bathonian (8)
      - Callovian (13)
      - Page Sandstone (1)
      - Summerville Formation (1)
      - Walloon Coal Measures (1)
    - Norphlet Formation (9)
    - Opalinus Clay (2)
    - Oxford Clay (4)
    - Posidonia Shale (1)
    - San Rafael Group (1)
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    - Upper Jurassic
      - Arab Formation (4)
      - Bossier Formation (2)
      - Brushy Basin Member (2)
      - Buckner Formation (2)
      - Cotton Valley Group (3)
      - Entrada Sandstone (7)
      - Fulmar Formation (9)
      - Galice Formation (1)
      - Hanifa Formation (3)
      - Haynesville Formation (7)
      - Josephine Ophiolite (1)
      - Kimmeridge Clay (8)
      - Kimmeridgian (11)
      - Morrison Formation (4)
      - Oxfordian
        
        middle Oxfordian (1)
      - Portlandian (4)
      - Sarayaquillo Formation (1)
      - Schuler Formation (1)
      - Smackover Formation (7)
      - Sundance Formation (1)
      - Swift Formation (2)
      - Tithonian (5)
      - Volgian (2)
  - Kunga Group (1)
  - Navajo Sandstone (13)
  - Newark Supergroup (1)
  - Nicoya Complex (1)
  - Nugget Sandstone (2)
  - Pucara Group (1)
  - Serra Geral Formation (1)
  - Statfjord Formation (3)
  - Triassic
    - Chanares Formation (1)
    - Charlie Lake Formation (3)
    - Fremouw Formation (1)
    - Liard Formation (1)
    - Lower Triassic
      - Bunter (2)
      - Permian-Triassic boundary (9)
      - Smithian (1)
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    - Middle Triassic
      - Anisian (4)
      - Doig Formation (4)
      - Ladinian (4)
      - Muschelkalk (2)
    - Moenkopi Formation (3)
    - Montney Formation (10)
    - Narrabeen Group (1)
    - Red Peak Formation (1)
    - Sherwood Sandstone (9)
    - Shublik Formation (1)
    - Upper Triassic
      - Baldonnel Formation (2)
      - Carnian (4)
      - Chinle Formation (9)
      - Dockum Group (1)
      - Keuper (1)
      - Mercia Mudstone (4)
      - Molteno Formation (1)
      - Norian (7)
      - Pardonet Formation (2)
      - Petrified Forest Member (2)
      - Rhaetian
        
        Penarth Group (1)
      - Shinarump Member (2)
      - Xujiahe Formation (4)
      - Yanchang Formation (17)
  - upper Mesozoic (4)
  - Vaca Muerta Formation (5)
  - Wingate Sandstone (2)
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- MIS 2 (2)
- MIS 3 (3)
- MIS 5 (2)
- MIS 6 (1)
- MIS 7 (1)
- Paleozoic
  - Bedford Shale (1)
  - Berea Sandstone (5)
  - Bird Spring Formation (1)
  - Cambrian
    - Acadian (1)
    - Bonanza King Formation (1)
    - Brigham Group (1)
    - Carrara Formation (1)
    - Conasauga Group (2)
    - Lower Cambrian
      - Terreneuvian (2)
    - Middle Cambrian
      - Burgess Shale (3)
      - Flathead Sandstone (1)
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    - Upper Cambrian
      - Dresbachian (1)
      - Eau Claire Formation (5)
      - Furongian (3)
      - Mount Simon Sandstone (6)
      - Potsdam Sandstone (4)
  - Carboniferous
    - Albert Formation (3)
    - Amsden Formation (2)
    - Bartlesville Sand (1)
    - Benxi Formation (2)
    - Burbank Sand (1)
    - Lower Carboniferous
      - Asbian (2)
      - Dinantian (5)
    - Mabou Group (1)
    - Middle Carboniferous (1)
    - Mississippian
      - Barnett Shale (8)
      - Big Injun Sandstone (1)
      - Boone Formation (1)
      - Borden Group (1)
      - Chainman Shale (1)
      - Charles Formation (1)
      - Leadville Formation (1)
      - Lower Mississippian
        
        Cuyahoga Formation (1)
        
        Fort Payne Formation (1)
        
        Kinderhookian
        
        Banff Formation (1)
        
        Lodgepole Formation (5)
        
        Osagian (2)
        
        Pocono Formation (2)
        
        Tournaisian (2)
      - Madison Group (3)
      - Middle Mississippian
        
        Visean
        
        Great Scar Limestone (1)
        
        upper Visean (3)
      - Mission Canyon Limestone (1)
      - Upper Mississippian
        
        Chesterian
        
        Aux Vases Sandstone (2)
        
        Cypress Sandstone (2)
        
        Renault Formation (1)
        
        Fayetteville Formation (2)
        
        Greenbrier Limestone (1)
        
        Hartselle Sandstone (1)
        
        Hinton Formation (1)
        
        Mauch Chunk Formation (3)
        
        Meramecian
        
        Sainte Genevieve Limestone (3)
        
        Salem Limestone (4)
        
        Pennington Formation (1)
        
        Serpukhovian (2)
        
        Tuscumbia Limestone (1)
      - Valmeyeran (2)
    - Namurian (2)
    - Pennsylvanian
      - Conemaugh Group (4)
      - Joggins Formation (1)
      - Lower Pennsylvanian
        
        Bashkirian (2)
        
        Crab Orchard Mountains Group (1)
        
        Gizzard Group (1)
      - Middle Pennsylvanian
        
        Allegheny Group (3)
        
        Atokan
        
        Atoka Formation (1)
        
        Breathitt Formation (1)
        
        Desmoinesian
        
        Spiro Sandstone (1)
        
        Moscovian (6)
        
        Paradox Formation (1)
      - Minturn Formation (3)
      - Monongahela Group (4)
      - Morrow Formation (3)
      - Pittsburgh Coal (1)
      - Pottsville Group (2)
      - Saginaw Formation (1)
      - Upper Pennsylvanian
        
        Ames Limestone (1)
        
        Canyon Group (2)
        
        Cisco Group (1)
        
        Glenshaw Formation (1)
        
        Gzhelian (2)
        
        Missourian (1)
        
        Virgilian
        
        Wabaunsee Group (1)
    - Springer Formation (2)
    - Upper Carboniferous
      - Millstone Grit (1)
      - Stephanian (2)
      - Westphalian (6)
  - Catskill Formation (3)
  - Chattanooga Shale (1)
  - Devonian
    - Beaverhill Lake Group (1)
    - Lower Devonian
      - Emsian (2)
      - Manlius Formation (1)
      - Oriskany Sandstone (1)
      - Pragian (1)
      - Shap Granite (1)
    - Middle Devonian
      - Eifelian (2)
      - Elk Point Group (2)
      - Givetian (4)
      - Hamilton Group (1)
      - Mahantango Formation (1)
      - Marcellus Shale (8)
      - Winnipegosis Formation (1)
    - Miette Complex (1)
    - Muth Quartzite (1)
    - Old Red Sandstone (10)
    - Popovich Formation (1)
    - Ramparts Formation (1)
    - Slave Point Formation (1)
    - Swan Hills Formation (4)
    - Upper Devonian
      - Brallier Shale (1)
      - Duperow Formation (1)
      - Famennian
        
        lower Famennian (1)
        
        upper Famennian (1)
        
        Wabamun Group (1)
      - Frasnian
        
        Leduc Formation (6)
        
        upper Frasnian (1)
      - Grosmont Formation (4)
      - Hampshire Formation (1)
      - Huron Member (1)
      - Jefferson Group (1)
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  - lower Paleozoic
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  - Ordovician
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    - Middle Ordovician
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      - Galena Dolomite (1)
      - Glenwood Shale (1)
      - Platteville Formation (1)
      - Saint Peter Sandstone (8)
      - Simpson Group (1)
      - Winnipeg Formation (3)
    - Pogonip Group (1)
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    - Upper Ordovician
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      - Caradocian
        
        Borrowdale Volcanic Group (1)
      - Cincinnatian (3)
      - Fairview Formation (2)
      - Hirnantian (3)
      - Juniata Formation (1)
      - Katian (8)
      - Kope Formation (1)
      - Queenston Shale (1)
      - Red River Formation (1)
      - Sandbian (3)
      - Trentonian (1)
    - Utica Shale (1)
    - Valmy Formation (1)
    - Viola Limestone (1)
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  - Permian
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    - Council Grove Group (1)
    - Cutler Formation (4)
    - Ecca Group (2)
    - Gharif Formation (2)
    - Guadalupian
      - Bell Canyon Formation (1)
      - Brushy Canyon Formation (2)
      - Capitanian (1)
      - Cherry Canyon Formation (2)
      - Delaware Mountain Group (1)
      - Grayburg Formation (1)
      - Queen Formation (1)
      - Roadian (1)
      - Seven Rivers Formation (1)
      - Tansill Formation (1)
      - Wordian (2)
    - Irati Formation (2)
    - Kaibab Formation (1)
    - Khuff Formation (8)
    - Longtan Formation (1)
    - Lower Permian
      - Abo Formation (1)
      - Al Khlata Formation (1)
      - Autunian (1)
      - Cherry Canyon Formation (2)
      - Cisuralian
        
        Artinskian (3)
        
        Asselian (1)
        
        Kungurian (5)
        
        Sakmarian (2)
      - Leman Sandstone Formation (5)
      - Leonardian
        
        Bone Spring Limestone (2)
      - Opeche Shale (1)
      - Wolfcampian (10)
    - Lyons Sandstone (3)
    - Middle Permian (9)
    - Park City Formation (1)
    - Phosphoria Formation (2)
    - Rio Bonito Formation (1)
    - Rotliegendes (16)
    - Saxonian (1)
    - Shihezi Formation (5)
    - Unayzah Formation (8)
    - Upper Permian
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      - Lopingian
        
        Changhsingian (1)
        
        Wuchiapingian (1)
      - Permian-Triassic boundary (9)
      - Rio do Rasto Formation (1)
      - Salado Formation (1)
      - Zechstein (6)
    - Wellington Formation (1)
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  - Silurian
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        Rhuddanian (2)
        
        Telychian (1)
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        Homerian (2)
        
        Much Wenlock Limestone (1)
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        Tonoloway Limestone (2)
      - Ludlow
        
        Gorstian (2)
        
        Ludfordian (2)
      - Pridoli (3)
  - Supai Formation (3)
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  - upper Paleozoic
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- Phanerozoic (7)
- Precambrian
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  - Biwabik Iron Formation (2)
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  - upper Precambrian
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        Baraboo Quartzite (3)
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      - Keweenawan
        
        Copper Harbor Conglomerate (1)
      - Kombolgie Formation (1)
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      - Mesoproterozoic
        
        Belt Supergroup (1)
        
        Calymmian (1)
        
        Helikian (1)
        
        Roper Group (1)
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        Blaini Formation (1)
        
        Cryogenian (7)
        
        Dengying Formation (1)
        
        Doushantuo Formation (2)
        
        Ediacaran
        
        Wonoka Formation (1)
        
        Marinoan (6)
        
        Otavi Group (2)
        
        Riphean (2)
        
        Sturtian (5)
        
        Tonian (2)
        
        Torridonian (4)
        
        Vendian (8)
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        Baker Lake Group (1)
        
        Statherian (1)
        
        Virginia Formation (1)
        
        Willyama Supergroup (1)
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        Dengying Formation (1)
        
        Doushantuo Formation (2)
      - Umberatana Group (1)
      - Windermere System (1)
  - Ventersdorp Supergroup (1)
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igneous rocks
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        dunite (3)
        
        harzburgite (1)
        
        lherzolite (1)
        
        spinel lherzolite (1)
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metamorphic rocks
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meteorites
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        Tagish Lake Meteorite (1)
minerals
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        adularia (2)
        
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        opal-A (7)
        
        opal-CT (6)
      - quartz (132)
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    - sodalite group
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        zircon (61)
    - sorosilicates
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        epidote (2)
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        gehlenite (3)
        
        melilite (2)
  - ring silicates
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    - mica group
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- sulfates
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- sulfides
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- vanadates
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Primary terms
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- Africa
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