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NARROW
Format
Article Type
Journal
Publisher
Section
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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East African Rift (2)
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Southern Africa
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Botswana
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Okavango Delta (1)
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South Africa
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Bushveld Complex (1)
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Cape Province region (1)
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Transvaal region (1)
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-
-
-
Antarctica (1)
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Arctic Ocean
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Barents Sea (1)
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Norwegian Sea
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Voring Basin (1)
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Voring Plateau (1)
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Arctic region
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Greenland
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Ilimaussaq (1)
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South Greenland (1)
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North Pole (1)
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Russian Arctic
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Franz Josef Land (1)
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Novaya Zemlya (3)
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Asia
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Baikal region (2)
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Central Asia
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Kazakhstan (1)
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Far East
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China
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Sichuan China (1)
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Tarim Platform (2)
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Mongolia (1)
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Vietnam (1)
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Kamchatka Russian Federation
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Middle East
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Iran
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Russian Pacific region (1)
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Siberia (5)
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Siberian Platform (1)
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Tajikistan (1)
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Tyumen Russian Federation
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Yamal-Nenets Russian Federation
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Urengoy Field (1)
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Yakutia Russian Federation (1)
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Atlantic Ocean
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Mid-Atlantic Ridge (1)
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North Atlantic
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Scotian Slope (1)
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South Atlantic (1)
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Atlantic region (1)
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Canada
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Ungava (1)
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Western Canada
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Northwest Territories
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Yellowknife Northwest Territories (1)
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Saskatchewan (1)
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Commonwealth of Independent States
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Kazakhstan (1)
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Russian Federation
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Arkhangelsk Russian Federation
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Franz Josef Land (1)
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Novaya Zemlya (3)
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Baikal region (2)
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Kamchatka Russian Federation
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Kamchatka Peninsula (1)
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Karelia Russian Federation (1)
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Russian Arctic
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Franz Josef Land (1)
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Novaya Zemlya (3)
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Russian Pacific region (1)
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Siberian Platform (1)
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Tyumen Russian Federation
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Yamal-Nenets Russian Federation
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Urengoy Field (1)
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Yakutia Russian Federation (1)
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Tajikistan (1)
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Urals
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Novaya Zemlya (3)
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East Pacific Ocean Islands
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Hawaii (4)
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Europe
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Arkhangelsk Russian Federation
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Franz Josef Land (1)
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Novaya Zemlya (3)
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Karelia Russian Federation (1)
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Western Europe
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France (1)
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Iceland (1)
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United Kingdom
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Great Britain
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Franklin Mountains (1)
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Indian Ocean
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Red Sea
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Atlantis II Deep (1)
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Mediterranean region (1)
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North America (3)
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Oceania
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Polynesia
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French Polynesia
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Tuamotu Islands
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Mururoa Atoll (1)
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Hawaii (4)
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Samoa (2)
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ODP Site 642 (1)
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Pacific Ocean
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East Pacific
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Southeast Pacific
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Tonga Trench (1)
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North Pacific
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Northwest Pacific
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Japan Trench (1)
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South Pacific
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Southeast Pacific
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Tonga Trench (1)
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Southwest Pacific
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Bismarck Sea
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Manus Basin (1)
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West Pacific
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Northwest Pacific
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Japan Trench (1)
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Southwest Pacific
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Pacific region (1)
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polar caps (1)
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South America
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Brazil
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United States
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South Carolina (1)
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Texas
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USSR (3)
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commodities
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hydrogen
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isotopes
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C-14 (2)
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Re-187/Os-188 (1)
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stable isotopes
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C-13/C-12 (3)
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Fe-56/Fe-54 (1)
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Fe-57/Fe-54 (2)
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N-15/N-14 (2)
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Nd-144/Nd-143 (1)
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O-18 (1)
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O-18/O-16 (2)
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Os-188/Os-187 (1)
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Re-187/Os-188 (1)
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Si-29/Si-28 (2)
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Si-30/Si-28 (3)
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Sr-87/Sr-86 (2)
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W-182 (2)
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Zn-66 (1)
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metals
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potassium (1)
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aluminum (1)
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chromium (2)
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cobalt (2)
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copper
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Cu-65 (1)
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germanium (2)
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hafnium
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Hf-182 (2)
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indium (1)
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iron
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Fe-56/Fe-54 (1)
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Fe-57/Fe-54 (2)
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ferric iron (1)
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ferrous iron (1)
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lead
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Pb-210 (1)
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nickel (9)
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platinum group
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iridium (1)
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osmium
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Os-188/Os-187 (1)
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Re-187/Os-188 (1)
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palladium (2)
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platinum (2)
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rhodium (2)
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ruthenium (2)
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rare earths
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gadolinium (1)
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neodymium
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Nd-144/Nd-143 (1)
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yttrium (1)
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rhenium
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Re-187/Os-188 (1)
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tin (1)
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tungsten
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W-182 (2)
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vanadium (2)
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zinc
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Zn-65 (1)
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Zn-66 (1)
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-
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nitrogen
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N-15/N-14 (2)
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noble gases
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helium
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He-4/He-3 (1)
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xenon (1)
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oxygen
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O-18 (1)
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O-18/O-16 (2)
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short-lived isotopes (1)
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silicon
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Si-29/Si-28 (2)
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Si-30/Si-28 (3)
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sulfur (14)
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trace metals (1)
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fossils
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Invertebrata
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Protista
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Foraminifera
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Rotaliina
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Bulimina (1)
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microfossils (2)
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palynomorphs
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miospores (1)
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Plantae (1)
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geochronology methods
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Hf/W (1)
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paleomagnetism (14)
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radiation damage (1)
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Re/Os (1)
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U/Pb (1)
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geologic age
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Cenozoic
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Quaternary
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Holocene
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upper Holocene (1)
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Pleistocene
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upper Pleistocene
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Wisconsinan (1)
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-
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Tertiary
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Paleogene
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Eocene (1)
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Oligocene (1)
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Mesozoic
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Cretaceous
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Middle Cretaceous (1)
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Viking Formation (1)
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Jurassic (1)
-
Triassic
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Lower Triassic
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Permian-Triassic boundary (1)
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upper Mesozoic (1)
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Paleozoic
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Carboniferous
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Mississippian (1)
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Pennsylvanian
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Middle Pennsylvanian
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Atokan (1)
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Desmoinesian (1)
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Strawn Series (1)
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-
Upper Carboniferous (1)
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Ordovician
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Lower Ordovician
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Ellenburger Group (1)
-
-
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Permian
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Upper Permian
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Permian-Triassic boundary (1)
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-
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upper Paleozoic (2)
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Phanerozoic (4)
-
Precambrian
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Archean
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Paleoarchean (1)
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Hadean (4)
-
upper Precambrian
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Proterozoic
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Great Oxidation Event (2)
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Neoproterozoic (2)
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Paleoproterozoic (1)
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-
-
-
-
igneous rocks
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igneous rocks
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carbonatites (3)
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feldspathoid rocks (1)
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kimberlite (4)
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picrite (2)
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plutonic rocks
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anorthosite (1)
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diorites
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trondhjemite (1)
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granites (3)
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granodiorites (1)
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syenites
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nepheline syenite (1)
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ultramafics
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peridotites
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lherzolite (1)
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volcanic rocks
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basalts
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flood basalts (2)
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mid-ocean ridge basalts (4)
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ocean-island basalts (1)
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glasses (2)
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komatiite (3)
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meimechite (2)
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-
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ophiolite (1)
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pyrolite (3)
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volcanic ash (1)
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metamorphic rocks
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metamorphic rocks
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eclogite (2)
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impactites (1)
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ophiolite (1)
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meteorites
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meteorites
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Asuka Meteorites (1)
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iron meteorites (2)
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stony irons
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stony meteorites
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achondrites
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HED meteorites (1)
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chondrites
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carbonaceous chondrites
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CV chondrites
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enstatite chondrites (1)
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minerals
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alloys
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carbides
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cohenite (2)
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nitrides (1)
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carbonates
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minerals (5)
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native elements
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diamond (9)
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silicates
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chain silicates
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amphibole group
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orthopyroxene
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wollastonite group
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framework silicates
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feldspar group
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silica minerals
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sodalite group
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zeolite group
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magnesian silicates (2)
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orthosilicates
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britholite group
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olivine group
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olivine (7)
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ringwoodite (1)
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wadsleyite (2)
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titanite group
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zircon group
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zircon (1)
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sheet silicates
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chlorite group
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chlorite (1)
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clay minerals
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serpentine group
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talc (1)
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sulfates (2)
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pyrite (2)
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troilite (1)
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sulfosalts (1)
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Primary terms
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absolute age (4)
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Africa
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East African Rift (2)
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Southern Africa
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Botswana
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Okavango Delta (1)
-
-
South Africa
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Bushveld Complex (1)
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Cape Province region (1)
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Transvaal region (1)
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-
-
-
Antarctica (1)
-
Arctic Ocean
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Barents Sea (1)
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Norwegian Sea
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Voring Basin (1)
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Voring Plateau (1)
-
-
-
Arctic region
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Greenland
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Ilimaussaq (1)
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South Greenland (1)
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North Pole (1)
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Russian Arctic
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Franz Josef Land (1)
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Novaya Zemlya (3)
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-
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Asia
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Baikal region (2)
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Central Asia
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Kazakhstan (1)
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Far East
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China
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Sichuan China (1)
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Tarim Platform (2)
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Mongolia (1)
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Vietnam (1)
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Kamchatka Russian Federation
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Kamchatka Peninsula (1)
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Middle East
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Iran
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Elburz (1)
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Tehran Iran (1)
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Russian Pacific region (1)
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Siberia (5)
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Siberian Platform (1)
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Tajikistan (1)
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Tyumen Russian Federation
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Yamal-Nenets Russian Federation
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Urengoy Field (1)
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Yakutia Russian Federation (1)
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asteroids (6)
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Atlantic Ocean
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Mid-Atlantic Ridge (1)
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North Atlantic
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Northwest Atlantic (1)
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Scotian Shelf (1)
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South Atlantic (1)
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Atlantic region (1)
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atmosphere (12)
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biogeography (1)
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boron (1)
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brines (2)
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Canada
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Ungava (1)
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Western Canada
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British Columbia (1)
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Northwest Territories
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Yellowknife Northwest Territories (1)
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Saskatchewan (1)
-
-
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carbon
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C-13 (1)
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C-13/C-12 (3)
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C-14 (2)
-
-
Cenozoic
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Quaternary
-
Holocene
-
upper Holocene (1)
-
-
Pleistocene
-
upper Pleistocene
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Wisconsinan (1)
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-
-
-
Tertiary
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Paleogene
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Eocene (1)
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Oligocene (1)
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-
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chemical analysis (2)
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Invertebrata
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Anthozoa (1)
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Protista
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Rotaliina
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ionosphere (1)
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isotopes
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radioactive isotopes
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Hf-182 (2)
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Pb-210 (1)
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Re-187/Os-188 (1)
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Zn-65 (1)
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stable isotopes
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C-13 (1)
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C-13/C-12 (3)
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Cu-65 (1)
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deuterium (2)
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Fe-56/Fe-54 (1)
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Fe-57/Fe-54 (2)
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He-4/He-3 (1)
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1-20 OF 267 RESULTS FOR
core
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Journal Article
Measurements of the Lamb-Mössbauer factor at simultaneous high-pressure-temperature conditions and estimates of the equilibrium isotopic fractionation of iron
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 March 2022
American Mineralogist (2022) 107 (3): 421–431.
... to the extrapolation of room temperature nuclear resonant inelastic X-ray scattering data. Our study suggests that anharmonicity may be more prevalent in Fe metal than in lower mantle minerals at 2800 K and 50 GPa, a relevant condition for the core formation, and the silicate mantle may be isotopically heavy in iron...
Journal Article
Structure of basaltic glass at pressures up to 18 GPa
Tomonori Ohashi, Tatsuya Sakamaki, Ken-ichi Funakoshi, Takanori Hattori, Naoki Hisano, Jun Abe, Akio Suzuki
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 March 2022
American Mineralogist (2022) 107 (3): 325–335.
... pressure X-ray diffraction neutron diffraction Physics and Chemistry of Earth’s Deep Mantle and Core It is well known that the physicochemical properties of magmas, such as density, viscosity, and elastic moduli, are sensitive to their atomic structures (e.g., Sakamaki 2018 ). Thus...
Journal Article
Ab initio study of structural, elastic and thermodynamic properties of Fe 3 S at high pressure: Implications for planetary cores
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 2022
American Mineralogist (2022) 107 (2): 248–256.
... these results with recently reported experimental values. Finally, our calculations under the conditions of the Earth’s inner core allow us to estimate a S content of 2.7 wt% S, assuming the only components of the inner core are Fe and Fe 3 S, a linear variation of elastic properties between end-members Fe...
Journal Article
Experimental determination of carbon diffusion in liquid iron at high pressure
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 December 2021
American Mineralogist (2021) 106 (12): 1950–1956.
...Anna M. Rebaza; Esther S. Posner; Marcel Thielmann; David C. Rubie; Gerd Steinle-Neumann Abstract The transport properties of liquid iron alloys at high pressure ( P ) and temperature ( T ) are essential for understanding the formation, composition, and evolution of planetary cores. Light alloying...
Journal Article
Ironing Out Isotopic Differences Among Rocky Bodies
Journal: Elements
Publisher: Mineralogical Society of America
Published: 01 December 2021
Elements (2021) 17 (6): 407–412.
... to that between different planetary bodies. Isotopic signatures arising from primordial events, namely, evaporation/condensation, core formation and melting/crystallization, may be progressively diluted, modified, and redistributed over time by global recycling processes such as plate tectonics. Here, we assess...
Journal Article
Sound velocities of iron-nickel (Fe 90 Ni 10 ) alloy up to 8 GPa and 773 K: The effect of nickel on the elastic properties of bcc-iron at high P-T
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 November 2021
American Mineralogist (2021) 106 (11): 1744–1750.
...Siheng Wang; Nao Cai; Xintong Qi; Sibo Chen; Baosheng Li Abstract Sound velocities of iron and iron-based alloys at high pressure and high temperature are crucial for understanding the composition and structure of Earth’s and other telluric planetary cores. In this study, we performed ultrasonic...
Journal Article
Observations of P K K P a b Diffraction Waves Well Beyond Cutoff Distance
Journal: Seismological Research Letters
Publisher: Seismological Society of America
Published: 22 September 2021
Seismological Research Letters (2022) 93 (1): 376–385.
...Yulin Chen; Sidao Ni; Baolong Zhang Abstract The core mantle boundary (CMB) features the most dramatic contrast in the physical properties within the Earth and plays a fundamental role in the understanding of the dynamic evolution of the Earth’s interior. Seismic core phases such as PKKP sample...
Includes: Supplemental Content
Journal Article
P-V-T measurements of Fe 3 C to 117 GPa and 2100 K: Implications for stability of Fe 3 C phase at core conditions
Chris McGuire, Tetsuya Komabayashi, Samuel Thompson, Geoffrey Bromiley, Takayuki Ishii, Eran Greenberg, Vitali B. Prakapenka
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 August 2021
American Mineralogist (2021) 106 (8): 1349–1359.
..., Fe 3 C, Fe 7 C 3 , and liquid are stable, which places constraints on the liquidus temperature of the outer core, namely inner core crystallization temperature, as the inner core would be comprised by the liquidus phase. Two possible P-T locations for the invariant point were predicted from existing...
Journal Article
Precise determination of the effect of temperature on the density of solid and liquid iron, nickel, and tin
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 July 2021
American Mineralogist (2021) 106 (7): 1077–1082.
... of a planetary core, the equation of state (EoS) of Fe alloys provides indispensable information, along with planetary exploration data. The density of Fe alloys at ambient pressure is one of the most fundamental characteristics used to describe the EoS, as well as its elastic properties (bulk modulus, K , its...
Journal Article
Chemical reactions in the Fe 2 SiO 4 -D 2 system with a variable deuterium content at 7.5 GPa
Vadim S. Efimchenko, Nicolay V. Barkovskii, Vladimir K. Fedotov, Konstantin P. Meletov, Artem V. Prokoshin
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 July 2021
American Mineralogist (2021) 106 (7): 1097–1104.
...Vadim S. Efimchenko; Nicolay V. Barkovskii; Vladimir K. Fedotov; Konstantin P. Meletov; Artem V. Prokoshin Abstract Hydrogen-induced decomposition of fayalite (Fe 2 SiO 4 ) at high pressure is of considerable interest for a better understanding of the chemical processes occurring in the cores...
Journal Article
Time Between 3 and 2 Ga: Transitional Events in the Earth’s History
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 January 2021
Russ. Geol. Geophys. (2021) 62 (1): 25–43.
... were driven by subduction processes, whereby the crust became recycled in the mantle and the double layer (D”) formed at the core–mantle boundary. The events of the 3–2 Ga interval created prerequisites for redox changes on the surface and release of free oxygen into the atmosphere. In terms of global...
Journal Article
Typical Characteristics of the Earth’s Magnetic and Gravity Fields Related to Global and Regional Tectonics
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 January 2021
Russ. Geol. Geophys. (2021) 62 (1): 6–24.
... reversals, can be among the main indicators of the evolution of the geodynamo – the heat mechanism controlling the entire series of global tectonic processes. The frequency of reversals is determined by the intensity of mantle plumes that cause the cooling of the core, increase the convection rate...
Journal Article
Phase transitions in ε-FeOOH at high pressure and ambient temperature
Elizabeth C. Thompson, Anne H. Davis, Nigel M. Brauser, Zhenxian Liu, Vitali B. Prakapenka, Andrew J. Campbell
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 December 2020
American Mineralogist (2020) 105 (12): 1769–1777.
... ) that may transport water (OH – ) deep into the Earth's lower mantle. Additionally, the pyrite-type polymorph (space group Pa 3 of FeOOH), and its potential dehydration have been linked to phenomena as diverse as the introduction of hydrogen into the outer core ( Nishi et al. 2017 ), the formation...
Journal Article
Phase Relations of Iron Carbides Fe 2 C, Fe 3 C, and Fe 7 C 3 at the Earth’s Core Pressures and Temperatures
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 December 2020
Russ. Geol. Geophys. (2020) 61 (12): 1345–1353.
...N.E. Sagatov; P.N. Gavryushkin; I.V. Medrish; T.M. Inerbaev; K.D. Litasov Abstract —Based on first-principle calculations in the framework of the density functional theory and structure prediction algorithms, we have determined iron carbide phases stable at the Earth’s core pressures...
Journal Article
New pressure-induced phase transition to Co 2 Si-type Fe 2 P
Yoichi Nakajima, Shunya Araki, Daisuke Kinoshita, Kei Hirose, Shigehiko Tateno, Saori I. Kawaguchi, Naohisa Hirao
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 November 2020
American Mineralogist (2020) 105 (11): 1752–1755.
... to be stable, at least to 83 GPa at high temperature. The Birch-Murnaghan equation of state for C37 Fe 2 P was also obtained from pressure-volume data, suggesting that phosphorous contributes to 17% of the observed density deficit of the Earth's outer core when it includes the maximum 1.8 wt% P as observed...
Journal Article
Density and sound velocity of liquid Fe-S alloys at Earth's outer core P-T conditions
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 September 2020
American Mineralogist (2020) 105 (9): 1349–1354.
...Jie Fu; Lingzhi Cao; Xiangmei Duan; Anatoly B. Belonoshko Abstract Pressure-temperature-volume ( P-T-V ) data on liquid iron-sulfur (Fe-S) alloys at the Earth's outer core conditions (~136 to 330 GPa, ~4000 to 7000 K) have been obtained by first-principles molecular dynamics simulations. We...
Journal Article
Experimental investigation of the effect of nickel on the electrical resistivity of Fe-Ni and Fe-Ni-S alloys under pressure
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 July 2020
American Mineralogist (2020) 105 (7): 1069–1077.
... and upper bounds of thermal conductivity were calculated. For all Ni-bearing alloys, thermal conductivity estimates range between ~12 and 20 W/(m⋅K) over the considered pressure and temperature ranges. Adiabatic heat fluxes were computed for both Ganymede's core and the Lunar core, and heat flux values...
Journal Article
Stability of fcc phase FeH to 137 GPa
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 June 2020
American Mineralogist (2020) 105 (6): 917–921.
... structure at the P-T conditions of the Earth's core, rather than in the double-hexagonal close packed (dhcp) structure as previously reported. We compared the experimentally determined unit-cell volumes of FeH with those from ab initio calculations. Additionally, we observed a change in compressibility...
Journal Article
Redox Processes in Early Earth Accretion and in Terrestrial Bodies
Journal: Elements
Publisher: Mineralogical Society of America
Published: 01 June 2020
Elements (2020) 16 (3): 161–166.
...; later larger bodies had formed cores and mantles with distinct properties. In addition, there may have been an overall trend of early reduced and later oxidized material accreting to form the Earth. This paper provides an overview—based on natural materials in our Earthbound sample collections...
Journal Article
The Redox Boundaries of Earth’s Interior
Journal: Elements
Publisher: Mineralogical Society of America
Published: 01 June 2020
Elements (2020) 16 (3): 167–172.
.... 2020 this issue) led to oxygen redistribution, resulting in a stratification of oxidation state by sinking of reduced iron (Fe 0 ) metal into the core and bonding of O 2− to mantle silicates, followed by outgassing of H 2 O-vapor, CO 2 , and CO into the atmosphere ( F ig . 1 ). The Earth’s early...
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