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all geography including DSDP/ODP Sites and Legs
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Africa
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Central Africa
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East Africa
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Europe
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Western Europe
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International Ocean Discovery Program (2)
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Kansas (4)
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Kentucky
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Louisiana
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Winnfield salt dome (1)
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Maryland (6)
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Massachusetts
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Berkshire County Massachusetts
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Michigan (3)
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Minnesota
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Fillmore County Minnesota (1)
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Mississippi
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Mississippi Embayment (2)
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Nevada (1)
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New Mexico
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New York
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North Dakota
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Slope County North Dakota (1)
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Ohio
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Ashtabula County Ohio (1)
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Cuyahoga County Ohio (1)
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Tennessee
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Texas
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U. S. Rocky Mountains
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Utah
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Virginia
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Washington
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Wetzel County West Virginia (1)
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Wyoming
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Big Horn County Wyoming (1)
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Johnson County Wyoming (1)
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commodities
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mineral deposits, genesis (1)
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mineral exploration (2)
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mineral resources (1)
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oil and gas fields (20)
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ornamental materials (1)
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petroleum
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natural gas
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coalbed methane (1)
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shale gas (2)
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elements, isotopes
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carbon
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C-13/C-12 (8)
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C-14 (1)
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chemical ratios (1)
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hydrogen
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D/H (4)
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isotope ratios (11)
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isotopes
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radioactive isotopes
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stable isotopes
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C-13/C-12 (8)
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O-18/O-16 (5)
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Sr-87/Sr-86 (1)
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metals
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alkaline earth metals
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beryllium (1)
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radium
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Ra-228/Ra-226 (1)
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strontium
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Sr-87/Sr-86 (1)
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aluminum (2)
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chromium (1)
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iron
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ferric iron (6)
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rare earths
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vanadium (1)
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nitrogen (1)
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oxygen
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O-18/O-16 (5)
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fossils
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Chordata
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Vertebrata
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Pisces
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Chondrichthyes
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Elasmobranchii (2)
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Osteichthyes
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Tetrapoda
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Mammalia
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Reptilia
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Archosauria
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Lepidosauria
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Squamata
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Lacertilia
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Mosasauridae (3)
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Sauropterygia
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Plesiosauria (1)
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coprolites (2)
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Invertebrata
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Echinodermata
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Cystoidea (1)
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Echinozoa
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Echinoidea (2)
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Mollusca
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Bivalvia
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Heterodonta
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Cephalopoda
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Gastropoda
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Porifera (1)
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Protista
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microfossils
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Conodonta
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Dinoflagellata (3)
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pollen (6)
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Plantae
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Coniferales (1)
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problematic fossils (1)
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Quaternary
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Pleistocene
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upper Quaternary (1)
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Stone Age
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Pliocene
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upper Pliocene (1)
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Paleogene
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Calvert Bluff Formation (1)
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Eocene
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Jacksonian (1)
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lower Eocene
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Willwood Formation (1)
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middle Eocene
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Carrizo Sand (1)
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Claiborne Group (1)
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Tallahatta Formation (1)
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-
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Oligocene
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Frio Formation (1)
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Paleocene
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Clayton Formation (1)
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lower Paleocene
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Danian (1)
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Nanafalia Formation (1)
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upper Paleocene
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Thanetian (1)
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Paleocene-Eocene Thermal Maximum (4)
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Renova Formation (1)
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Wilcox Group (2)
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-
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upper Cenozoic
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Pico Formation (1)
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-
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Mesozoic
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Cretaceous
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Lower Cretaceous
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McMurray Formation (1)
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-
Mancos Shale (1)
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Upper Cretaceous
-
Blackhawk Formation (1)
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Blufftown Formation (1)
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Campanian (1)
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Castlegate Sandstone (1)
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Cenomanian (3)
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Coker Formation (1)
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Demopolis Chalk (1)
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Eutaw Formation (3)
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Gallup Sandstone (1)
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Gulfian
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Eagle Ford Formation (1)
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Prairie Bluff Chalk (1)
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Woodbine Formation (2)
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Hell Creek Formation (1)
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K-T boundary (1)
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Maestrichtian
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upper Maestrichtian (1)
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-
Mooreville Chalk (2)
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Niobrara Formation (1)
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Pierre Shale (1)
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Ripley Formation (2)
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Santonian (1)
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Selma Group (1)
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Star Point Sandstone (1)
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Tuscaloosa Formation (1)
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Glen Canyon Group (1)
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Jurassic
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Lower Jurassic
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Upper Jurassic
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Haynesville Formation (1)
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Lower Mississippian
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Fort Payne Formation (2)
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Lake Valley Formation (1)
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Pocono Formation (1)
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Sunbury Shale (1)
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Upper Mississippian
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Chesterian
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Golconda Formation (1)
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Imo Formation (1)
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Fayetteville Formation (1)
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Hartselle Sandstone (3)
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Mauch Chunk Formation (1)
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Meramecian
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Salem Limestone (1)
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Warsaw Formation (1)
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Parkwood Formation (1)
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Serpukhovian (1)
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Allegheny Group (1)
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Atokan (2)
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Saginaw Formation (2)
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Upper Pennsylvanian
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Missourian
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Virgilian (2)
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-
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Catskill Formation (1)
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Chattanooga Shale (1)
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Oriskany Sandstone (1)
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Hamilton Group (3)
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Mahantango Formation (4)
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Marcellus Shale (14)
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Onondaga Limestone (3)
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Tioga Bentonite (2)
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Tully Limestone (3)
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-
Millboro Shale (3)
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Upper Devonian
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Brallier Shale (3)
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Chemung Formation (2)
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Frasnian (3)
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Huron Member (1)
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Ohio Shale (2)
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Helderberg Group (1)
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Keyser Limestone (1)
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Knox Group (1)
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lower Paleozoic
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Rose Run Sandstone (1)
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Ordovician
-
Eureka Quartzite (1)
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Lower Ordovician
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Beekmantown Group (1)
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Ellenburger Group (1)
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-
Middle Ordovician
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Bromide Formation (1)
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Decorah Shale (1)
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Saint Peter Sandstone (1)
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-
Upper Ordovician
-
Juniata Formation (1)
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Maquoketa Formation (1)
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Reedsville Formation (1)
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-
-
Permian
-
Coconino Sandstone (1)
-
Upper Permian (1)
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Silurian
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Clinch Sandstone (1)
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Lower Silurian
-
Tuscarora Formation (1)
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-
Middle Silurian
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McKenzie Formation (1)
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Racine Dolomite (1)
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Waldron Shale (1)
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-
Niagaran (1)
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Upper Silurian
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Cayugan
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Tonoloway Limestone (1)
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-
-
-
upper Paleozoic
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Antrim Shale (1)
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Woodford Shale (1)
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Precambrian
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igneous rocks
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ring silicates
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sulfides (1)
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Primary terms
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absolute age (5)
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Africa
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carbon
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C-13/C-12 (8)
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catalogs (1)
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Tertiary
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Paleogene
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middle Eocene
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Oligocene
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Frio Formation (1)
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Paleocene
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Clayton Formation (1)
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lower Paleocene
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Danian (1)
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Nanafalia Formation (1)
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upper Paleocene
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Thanetian (1)
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Paleocene-Eocene Thermal Maximum (4)
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Renova Formation (1)
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Wilcox Group (2)
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upper Cenozoic
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Pico Formation (1)
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Chordata
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Vertebrata
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Pisces
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Osteichthyes
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Tetrapoda
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Reptilia
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Pterosauria (1)
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Lepidosauria
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Squamata
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Sauropterygia
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Europe
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igneous rocks
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inclusions
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Indian Ocean Islands
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Integrated Ocean Drilling Program (1)
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Invertebrata
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Insecta (1)
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Brachiopoda
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Articulata (1)
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Echinodermata
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Crinozoa
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Crinoidea
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Inadunata
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Cystoidea (1)
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Echinozoa
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Echinoidea (2)
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-
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Mollusca
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Bivalvia
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Heterodonta
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Rudistae (1)
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Cephalopoda
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Ammonoidea (1)
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Gastropoda
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Porifera (1)
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Protista
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Foraminifera (1)
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isotopes
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C-14 (1)
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stable isotopes
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C-13/C-12 (8)
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O-18/O-16 (5)
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Sr-87/Sr-86 (1)
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limestone deposits (1)
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Mediterranean region (1)
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Mesozoic
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Cretaceous
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Lower Cretaceous
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McMurray Formation (1)
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Mancos Shale (1)
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Upper Cretaceous
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Blackhawk Formation (1)
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Blufftown Formation (1)
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Campanian (1)
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Castlegate Sandstone (1)
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Cenomanian (3)
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Coker Formation (1)
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Demopolis Chalk (1)
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Eutaw Formation (3)
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Gallup Sandstone (1)
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Gulfian
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Eagle Ford Formation (1)
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Prairie Bluff Chalk (1)
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Woodbine Formation (2)
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-
Hell Creek Formation (1)
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K-T boundary (1)
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Maestrichtian
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upper Maestrichtian (1)
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Mooreville Chalk (2)
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Niobrara Formation (1)
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Pierre Shale (1)
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Ripley Formation (2)
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Santonian (1)
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Selma Group (1)
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Star Point Sandstone (1)
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Turonian (1)
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Tuscaloosa Formation (1)
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-
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Glen Canyon Group (1)
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Jurassic
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Lower Jurassic
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Pliensbachian (1)
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Upper Jurassic
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Haynesville Formation (1)
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Navajo Sandstone (1)
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Triassic
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Upper Triassic
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Carnian (1)
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metal ores
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Sr-87/Sr-86 (1)
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Mexico
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North America
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Transcontinental Arch (1)
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Western Interior (2)
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Ocean Drilling Program
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Leg 104 (1)
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Leg 113
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ODP Site 690 (1)
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-
Leg 159
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ODP Site 959 (1)
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-
Leg 174AX (1)
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Leg 189
-
ODP Site 1172 (1)
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-
-
oil and gas fields (20)
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orogeny (4)
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oxygen
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O-18/O-16 (5)
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Pacific Ocean
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South Pacific
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Southwest Pacific
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Tasman Sea (1)
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-
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West Pacific
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Southwest Pacific
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Tasman Sea (1)
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paleobotany (1)
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Paleozoic
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Bedford Shale (1)
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Cambrian
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Upper Cambrian (1)
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Carboniferous
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Lower Carboniferous
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Dinantian (1)
-
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Mississippian
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Barnett Shale (2)
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Borden Group (1)
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Lower Mississippian
-
Fort Payne Formation (2)
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Kinderhookian
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Banff Formation (1)
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-
Lake Valley Formation (1)
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Osagian (3)
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Pocono Formation (1)
-
-
Sunbury Shale (1)
-
Upper Mississippian
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Chesterian
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Golconda Formation (1)
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Imo Formation (1)
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-
Fayetteville Formation (1)
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Hartselle Sandstone (3)
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Mauch Chunk Formation (1)
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Meramecian
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Salem Limestone (1)
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Warsaw Formation (1)
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-
Parkwood Formation (1)
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Serpukhovian (1)
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-
-
Pennsylvanian
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Lower Pennsylvanian (1)
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Middle Pennsylvanian
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Allegheny Group (1)
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Atokan (2)
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Pottsville Group (1)
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Saginaw Formation (2)
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Upper Pennsylvanian
-
Cisco Group (1)
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Missourian
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Wyandotte Limestone (1)
-
-
Virgilian (2)
-
-
-
-
Catskill Formation (1)
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Chattanooga Shale (1)
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Devonian
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Genesee Group (1)
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Lower Devonian
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Oriskany Sandstone (1)
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-
Middle Devonian
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Eifelian (1)
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Givetian (1)
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Hamilton Group (3)
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Mahantango Formation (4)
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Marcellus Shale (14)
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Onondaga Limestone (3)
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Tioga Bentonite (2)
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Tully Limestone (3)
-
-
Millboro Shale (3)
-
Upper Devonian
-
Brallier Shale (3)
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Chemung Formation (2)
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Famennian (3)
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Frasnian (3)
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Hampshire Formation (2)
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Huron Member (1)
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Ohio Shale (2)
-
-
-
Helderberg Group (1)
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Keyser Limestone (1)
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Knox Group (1)
-
lower Paleozoic
-
Rose Run Sandstone (1)
-
-
Ordovician
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Eureka Quartzite (1)
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Lower Ordovician
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Beekmantown Group (1)
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Ellenburger Group (1)
-
-
Middle Ordovician
-
Bromide Formation (1)
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Decorah Shale (1)
-
Saint Peter Sandstone (1)
-
-
Upper Ordovician
-
Juniata Formation (1)
-
Maquoketa Formation (1)
-
Reedsville Formation (1)
-
-
-
Permian
-
Coconino Sandstone (1)
-
Upper Permian (1)
-
-
Silurian
-
Clinch Sandstone (1)
-
Lower Silurian
-
Tuscarora Formation (1)
-
-
Middle Silurian
-
McKenzie Formation (1)
-
Racine Dolomite (1)
-
Waldron Shale (1)
-
-
Niagaran (1)
-
Upper Silurian
-
Cayugan
-
Tonoloway Limestone (1)
-
-
-
-
upper Paleozoic
-
Antrim Shale (1)
-
-
Woodford Shale (1)
-
-
palynomorphs
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Dinoflagellata (3)
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miospores
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paragenesis (2)
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petrology (4)
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phase equilibria (4)
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Plantae
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Pteridophyta (2)
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Spermatophyta
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Angiospermae
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Dicotyledoneae
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Quercus (1)
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Gymnospermae
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Coniferales (1)
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-
-
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plate tectonics (3)
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Precambrian
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Paleoarchean (1)
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problematic fossils (1)
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clastic rocks
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arkose (1)
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South America
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Andes
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Argentina
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Brazil
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GeoRef Categories
Era and Period
Epoch and Age