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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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West Africa
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Ghana (1)
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Atlantic Ocean
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North Atlantic
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Gulf of Mexico
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North America
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hydrogen
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C-14 (5)
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Pb-206/Pb-204 (3)
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Pb-207/Pb-204 (3)
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Pb-208/Pb-204 (3)
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tritium (1)
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stable isotopes
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D/H (1)
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Nd-144/Nd-143 (1)
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O-18/O-16 (2)
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Pb-206/Pb-204 (3)
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Pb-207/Pb-204 (3)
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Pb-208/Pb-204 (3)
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manganese (1)
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silver (3)
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tin (1)
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oxygen
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O-18/O-16 (2)
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sulfur
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fossils
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bacteria
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Chordata
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Vertebrata
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Actinopterygii (1)
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Tetrapoda
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Mammalia
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Theria
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Eutheria
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Rodentia
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coprolites (1)
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Invertebrata
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Insecta
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Articulata
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Orthida (1)
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Mesozoic
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Paleozoic
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Ordovician (2)
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Silurian (2)
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upper Paleozoic (1)
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Precambrian
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Proterozoic
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igneous rocks
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sheet silicates
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sulfates
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Primary terms
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absolute age (16)
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Africa
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West Africa
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Ghana (1)
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Atlantic Ocean
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North Atlantic
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Gulf of Mexico
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Yucatan Shelf (1)
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bacteria
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biogeography (3)
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carbon
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Cenozoic
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Quaternary
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Holocene
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upper Quaternary (2)
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Tertiary
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middle Tertiary (3)
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Neogene
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Hemphillian (1)
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Miocene
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lower Miocene (1)
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Pliocene
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lower Pliocene (1)
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Paleogene
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Eocene (3)
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Oligocene
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upper Oligocene (2)
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-
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Chordata
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Vertebrata
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Pisces
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Osteichthyes
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Actinopterygii (1)
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-
-
Tetrapoda
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Mammalia
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Theria
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Eutheria
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Carnivora
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Fissipeda
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Canidae (1)
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Perissodactyla
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Hippomorpha
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Equidae (1)
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Rodentia
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Myomorpha
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Cricetidae (1)
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Invertebrata
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Insecta
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Brachiopoda
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Articulata
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Spiriferida
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Atrypidae
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Strophomenida (1)
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Cnidaria
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Mollusca
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Ammonites (3)
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isotopes
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radioactive isotopes
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C-14 (5)
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Pb-206/Pb-204 (3)
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Pb-207/Pb-204 (3)
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Pb-208/Pb-204 (3)
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tritium (1)
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stable isotopes
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C-13/C-12 (1)
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D/H (1)
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Nd-144/Nd-143 (1)
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O-18/O-16 (2)
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Pb-206/Pb-204 (3)
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Pb-207/Pb-204 (3)
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Pb-208/Pb-204 (3)
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lava (3)
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Mesozoic
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Cretaceous
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Lower Cretaceous (1)
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Middle Cretaceous (1)
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Upper Cretaceous
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Gulfian
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Eagle Ford Formation (1)
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Turonian (2)
-
-
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Jurassic (4)
-
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metal ores
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base metals (2)
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copper ores (4)
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gold ores (1)
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lead ores (5)
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lead-zinc deposits (4)
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polymetallic ores (3)
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silver ores (8)
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uranium ores (5)
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zinc ores (3)
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metals
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actinides
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uranium (2)
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alkali metals
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cesium (1)
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potassium (1)
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sodium (1)
-
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alkaline earth metals
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calcium (2)
-
strontium
-
Sr-87/Sr-86 (4)
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-
-
antimony (1)
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arsenic (1)
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copper (3)
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germanium (1)
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gold (3)
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iron (1)
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lead
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Pb-206/Pb-204 (3)
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Pb-207/Pb-204 (3)
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Pb-208/Pb-204 (3)
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manganese (1)
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rare earths
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neodymium
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Nd-144/Nd-143 (1)
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silver (3)
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tin (1)
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vanadium (1)
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zinc (5)
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metamorphic rocks
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gneisses (1)
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metasomatic rocks
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skarn (2)
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slates (1)
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-
metamorphism (3)
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metasomatism (7)
-
Mexico
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Chihuahua Mexico
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Sierra Pena Blanca (3)
-
-
Coahuila Mexico (3)
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Durango Mexico (2)
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Guanajuato Mexico (1)
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Jalisco Mexico (1)
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Oaxaca Mexico (1)
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Sabinas Basin (2)
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Sierra Madre Occidental (7)
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Sierra Madre Oriental (1)
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Sonora Mexico (1)
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-
mineral deposits, genesis (16)
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mineral exploration (1)
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mineralogy (6)
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minerals (2)
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North America
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Basin and Range Province (4)
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Chihuahua tectonic belt (3)
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Chihuahuan Desert (5)
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Gulf Coastal Plain (1)
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Hueco Bolson (3)
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North American Craton (2)
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Rio Grande Rift (3)
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Rocky Mountains (1)
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oil and gas fields (1)
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orogeny (3)
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oxygen
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O-18/O-16 (2)
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-
Pacific Ocean
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East Pacific
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Northeast Pacific
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Gulf of California (2)
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-
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North Pacific
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Northeast Pacific
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Gulf of California (2)
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paleoclimatology (5)
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paleoecology (4)
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paleogeography (4)
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paleomagnetism (2)
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paleontology (9)
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Paleozoic
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Devonian
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Lower Devonian
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Ordovician (2)
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Permian
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Lower Permian
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Leonardian (1)
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-
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Silurian (2)
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upper Paleozoic (1)
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palynology (1)
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palynomorphs
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miospores
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pollen (1)
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paragenesis (4)
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petroleum
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petrology (8)
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phase equilibria (3)
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plate tectonics (3)
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Precambrian
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upper Precambrian
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Proterozoic
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Neoproterozoic (1)
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remote sensing (2)
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sedimentary petrology (2)
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sedimentary rocks
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chemically precipitated rocks
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stratigraphy (3)
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structural geology (3)
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sulfur
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tectonics
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tectonophysics (3)
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thermal waters (1)
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United States
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Arizona (1)
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California (1)
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Montana (1)
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Nevada (4)
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Dona Ana County New Mexico (1)
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Oregon (1)
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Texas
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Brewster County Texas
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Big Bend National Park (1)
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El Paso County Texas
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Hudspeth County Texas (3)
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chemically precipitated rocks
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clastic rocks
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sediments
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Distribution of trace elements in sphalerite and arsenopyrite on the nanometre-scale – discrete phases versus solid solution
What will be the future of the giant gypsum crystals of Naica mine?
M. Parise, Paolo Forti, F. Gabrovsek, G. Kaufmann, N. RavbarThe mine caves of Naica (Chihuahua, Mexico) are famous because they host large gypsum crystals. Mine works intersected new caves hosting the largest crystals in the world in the year 2000. From 2006 these caves became the object of a multidisciplinary research project with the goal of inferring their ages, the boundary conditions for their formation and the mechanisms inducing their development. Several other scientific aspects were also considered, including palynology, mineralogy, microbiology, physiology, hydrogeology and astrobiology. From 2006 to 2009, scientists and explorers tried to ensure the complete documentation of these natural wonders because they were expected to be accessible for only a few years. As a result of their location c. 160 m below the natural groundwater level, they were predicted to be flooded with thermal water as soon as dewatering of the mine ceased. This occurred at the end of 2015, so that the lower part of the mine is already submerged and in the near future the giant crystal caves will also disappear. Theoretically, it is still possible to maintain these incredible wonders for future generations, but this seems highly unlikely. Soon the crystals will be submerged below c. 150 m of hot water, restarting their incredible slow growth.
Genesis of the Carbonate-Hosted Tres Marias Zn-Pb-(Ge) Deposit, Mexico: Constraints from Rb-Sr Sphalerite Geochronology and Pb Isotopes
The 2013 Seismic Swarm in Chihuahua, Mexico: Evidence of Active Extensional Deformation in the Southern Basin and Range
Tracers of Groundwater Mixing in the Hueco Bolson Aquifer, Ciudad Juárez, Mexico
Latitudinal body-mass trends in Oligo-Miocene mammals
Using geophysical techniques to trace active faults in the urbanized northern Hueco Bolson, West Texas, USA, and northern Chihuahua, Mexico
Uranium and uranyl luminescence in agate/chalcedony
Determining gypsum growth temperatures using monophase fluid inclusions—Application to the giant gypsum crystals of Naica, Mexico: COMMENT
Determining gypsum growth temperatures using monophase fluid inclusions—Application to the giant gypsum crystals of Naica, Mexico: REPLY
Synvolcanic crustal extension during the mid-Cenozoic ignimbrite flare-up in the northern Sierra Madre Occidental, Mexico: Evidence from the Guazapares Mining District region, western Chihuahua
Tascotal Mesa transfer zone—An element of the Border Corridor transform system, Rio Grande rift of West Texas and adjacent Mexico
Mark R. Hudson, Patricia Wood Dickerson, V.J.S. (Tien) GrauchTascotal Mesa fault is the principal component of Tascotal Mesa transfer zone within the Rio Grande rift of Texas (USA) and Chihuahua (Mexico). Strata and structures along the zone attest to ~290 m.y. of tectonic and magmatic activity, from at least late Paleozoic time onward. The transfer zone comprises the Tascotal Mesa and newly documented Christmas Mountains–Grapevine Hills faults, as well as the Terlingua Creek pull-apart complex at the right step between those two dextral zones. Strike-slip (to ~1 km) and dip-slip (to ~735 m) displacements have occurred in the zone during the past 30–27 m.y.; young faults of the transfer zone displace mid-Pleistocene caliches. Stable isotope and palynologic data from travertines in the transfer zone indicate ascent of warm waters (25°–35 °C) along faults as recently as mid- to late Pleistocene time. Older, basement-rooted structural anisotropies are present in the Tascotal Mesa transfer zone but not all have been reactivated during Cenozoic rifting. Geophysically constrained physical models integrated with field data demonstrate that the Terlingua Creek pull-apart basin likely formed in cover strata that were detached from basement, as the orientations of surficial and buried basement structures differ markedly. Dip-slip displacement predominates on pull-apart faults, with significant dextral slip. Analysis of the role of the Tascotal Mesa transfer zone in Rio Grande rifting revealed that it and the flanking grabens (Presidio to the northwest; Redford to the southeast) are all parts of the Border Corridor transform zone. This transform zone interconnects rift segments from Mesilla graben to the Sunken Block and includes both transfer zones and grabens. Right-transtensional deformation, as manifested in historic earthquakes, accounts for differing orientations of transform (northwest) versus rift (north) grabens. Petrographic and geochronologic data indicate ascent of lavas of rift geochemical character in both the Tascotal Mesa transfer zone and the Border Corridor transform zone from ca. 30 Ma onward. K-Ar ages were determined for basalt (24.73 ± 1.96 Ma) and trachyte (25.42 ± 0.64 Ma) emplaced within the Tascotal Mesa transfer zone. Magmatism is bimodal; olivine basalt and/or hawaiite predominates. Basalts at the junctions of rift grabens and the Border Corridor transform zone entrain mantle and lower-crustal xenoliths.
Evidence for nanocrystals of vorlanite, a rare uranate mineral, in the Nopal I low-temperature uranium deposit (Sierra Peña Blanca, Mexico)
Determining gypsum growth temperatures using monophase fluid inclusions—Application to the giant gypsum crystals of Naica, Mexico
Timing of intense magmatic episodes in the northern and central Sierra Madre Occidental, western Mexico
Mexico: State of the Exploration for Oil and Gas
Norman C. Rosen, Alfredo E. Guzmàn, Paul Weimer, Sylvia Maria Coutes dos Anjos, Sverre Henrickson, Edmundo Marques, Mike Mayall, Richard Fillon, Tony D’Agostino, Art Saller, Kurt Campion, Tim Huang, Rick Sarg, Fred SchroederOf all the countries in the world considered to be oil rich, Mexico is the only one that consistently has been losing production and reserves in the last ten years. Even though Mexico has five major producing provinces: two for oil (the Southeast and the Tampico–Misantla basins) and three for gas (the Sabinas, Burgos and Veracruz basins), and has seven more with potential, (California, Gulf of Cortès, Chihuahua, Sierra Madre Oriental, Sierra de Chiapas, Progreso shelf, and the deep Gulf of Mèxico), its output and reserves have declined consistently. Many reasons can be attributed for these results, and as this note proves, least of them is the country’s endowment of oil and gas resources. The problem is that Mexico, since 1938, has had only one oil company responsible for all of its upstream activities and even though Pemex’s performance is comparable with that of most of the majors’ (it is world’s third largest in terms of production), it is impossible that all the remaining potential of the entire country can be found and produced with only one company, no matter how large, wealthy, efficient, technologically advanced, and successful it can be. The good news is that once the country opens up for third-party participation in exploration, which will eventually take place, results are going to be spectacular. So far there has only been a timid opening for development and exploitation opportunities.