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Journal
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Section
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
-
Africa
-
Southern Africa
-
South Africa
-
Free State South Africa
-
Vredefort Dome (1)
-
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-
-
-
Antarctica
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Antarctic Peninsula (1)
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Arctic Ocean
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Kara Sea (1)
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-
Arctic region
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Greenland (2)
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Asia
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Brahmaputra River (1)
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Central Asia
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Pamirs (2)
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Far East
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China
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North China Platform (1)
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Qinling Mountains (1)
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Xizang China
-
Lhasa Block (1)
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-
Philippine Islands
-
Luzon (1)
-
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Himalayas
-
Garhwal Himalayas (2)
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High Himalayan Crystallines (2)
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Kumaun Himalayas (2)
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Lesser Himalayas (2)
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Indian Peninsula
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India
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Himachal Pradesh India (3)
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Northeastern India
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Arunachal Pradesh India (1)
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Uttarakhand India
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Garhwal Himalayas (2)
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Nepal (4)
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Indus-Yarlung Zangbo suture zone (2)
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Karakoram (1)
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Main Central Thrust (6)
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Qiangtang Terrane (2)
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Tibetan Plateau (5)
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Atlantic Ocean
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North Atlantic
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North Sea (2)
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Australasia
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Australia
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Western Australia (4)
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Canada
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Eastern Canada
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Ontario
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Sudbury igneous complex (1)
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Western Canada
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British Columbia
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Prince Rupert British Columbia (1)
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Northwest Territories (1)
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Commonwealth of Independent States
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Western Europe
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Jack Hills (4)
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Mexico
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North America
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Appalachians
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Blue Ridge Mountains (1)
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Northern Appalachians (2)
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Southern Appalachians (1)
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Rio Grande Rift (1)
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San Joaquin Basin (1)
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South America
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Andes
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Brazil (1)
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United States
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Albuquerque Basin (1)
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Blue Ridge Mountains (1)
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Bronson Hill Anticlinorium (2)
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California
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San Bernardino County California
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San Joaquin County California (1)
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San Joaquin Valley (1)
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Georgia
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Grafton County New Hampshire (1)
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elements, isotopes
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stable isotopes
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Ar-40/Ar-39 (3)
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C-13/C-12 (2)
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He-4/He-3 (1)
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Hf-177/Hf-176 (1)
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O-18/O-16 (3)
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Sr-87/Sr-86 (2)
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metals
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thorium (1)
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alkali metals
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lithium
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alkaline earth metals
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Sr-87/Sr-86 (2)
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aluminum (1)
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hafnium
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Hf-177/Hf-176 (1)
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iron (1)
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lead
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Pb-206/Pb-204 (1)
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rare earths
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noble gases
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helium
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Invertebrata
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Insecta
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microfossils
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problematic microfossils (1)
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palynomorphs
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problematic fossils
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problematic microfossils (1)
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Mesozoic
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Paleozoic
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Precambrian
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Gunflint Iron Formation (1)
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Hadean (4)
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upper Precambrian
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Proterozoic
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Bitter Springs Formation (1)
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igneous rocks
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igneous rocks
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granophyre (2)
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plutonic rocks
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granites
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leucogranite (4)
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pegmatite (1)
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volcanic rocks
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rhyolites (1)
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metamorphic rocks
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metasedimentary rocks
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framework silicates
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zircon group
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zircon (14)
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sorosilicates
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epidote group
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sheet silicates
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mica group
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biotite (4)
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muscovite (6)
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-
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Primary terms
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absolute age (28)
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Africa
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Southern Africa
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South Africa
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Free State South Africa
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Vredefort Dome (1)
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-
-
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Antarctica
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Antarctic Peninsula (1)
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Arctic Ocean
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Kara Sea (1)
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Arctic region
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Greenland (2)
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Asia
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Brahmaputra River (1)
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Central Asia
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Pamirs (2)
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Far East
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China
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North China Platform (1)
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Qinling Mountains (1)
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Xizang China
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Lhasa Block (1)
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-
-
Philippine Islands
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Luzon (1)
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-
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Himalayas
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Garhwal Himalayas (2)
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High Himalayan Crystallines (2)
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Kumaun Himalayas (2)
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Lesser Himalayas (2)
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Indian Peninsula
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India
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Himachal Pradesh India (3)
-
Northeastern India
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Arunachal Pradesh India (1)
-
-
Uttarakhand India
-
Garhwal Himalayas (2)
-
-
-
Nepal (4)
-
-
Indus-Yarlung Zangbo suture zone (2)
-
Karakoram (1)
-
Main Central Thrust (6)
-
Qiangtang Terrane (2)
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Tibetan Plateau (5)
-
-
Atlantic Ocean
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North Atlantic
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North Sea (2)
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-
-
Australasia
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Australia
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Western Australia (4)
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biography (2)
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Canada
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Eastern Canada
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Ontario
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Sudbury igneous complex (1)
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Western Canada
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British Columbia
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Prince Rupert British Columbia (1)
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Northwest Territories (1)
-
-
-
carbon
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C-13/C-12 (2)
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-
Cenozoic
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Quaternary
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Holocene
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lower Holocene (1)
-
-
-
Siwalik System (1)
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Tertiary
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Neogene
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Miocene
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upper Miocene (2)
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upper Neogene (1)
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Paleogene
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Eocene (1)
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Oligocene (2)
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Paleocene
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lower Paleocene
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climate change (1)
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crust (8)
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Central Europe
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Western Europe
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United Kingdom
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geochronology (10)
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glacial geology (1)
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igneous rocks
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granophyre (2)
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plutonic rocks
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granites
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pegmatite (1)
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volcanic rocks
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pyroclastics
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rhyolites (1)
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inclusions (3)
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Indian Ocean
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intrusions (7)
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Invertebrata
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Insecta
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Diptera
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Chironomidae (1)
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isostasy (2)
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stable isotopes
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Nd-144/Nd-143 (1)
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O-18/O-16 (3)
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Mesozoic
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Cretaceous
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Upper Cretaceous
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Jurassic
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lower Mesozoic (2)
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Triassic
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metals
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alkali metals
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Li-7/Li-6 (1)
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alkaline earth metals
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-
Sr-87/Sr-86 (2)
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aluminum (1)
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hafnium
-
Hf-177/Hf-176 (1)
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-
iron (1)
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lead
-
Pb-206/Pb-204 (1)
-
-
rare earths
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neodymium
-
Nd-144/Nd-143 (1)
-
-
-
-
metamorphic rocks
-
gneisses (3)
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impactites (2)
-
metaigneous rocks
-
serpentinite (1)
-
-
metasedimentary rocks
-
metagraywacke (1)
-
metapelite (2)
-
-
metasomatic rocks
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serpentinite (1)
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schists
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-
metamorphism (14)
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Mexico
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minerals (2)
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noble gases
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argon
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Ar-40 (1)
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Ar-40/Ar-39 (3)
-
-
helium
-
He-4/He-3 (1)
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-
xenon (1)
-
-
North America
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Appalachians
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Blue Ridge Mountains (1)
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Northern Appalachians (2)
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Southern Appalachians (1)
-
-
Rio Grande Rift (1)
-
-
Ocean Drilling Program
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Leg 116
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ODP Site 717 (1)
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ODP Site 718 (1)
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oceanography (1)
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orogeny (7)
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oxygen
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upper Paleozoic (2)
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palynomorphs
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petroleum (1)
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petrology (2)
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Phanerozoic (1)
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plate tectonics (12)
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Precambrian
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Archean (2)
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Gunflint Iron Formation (1)
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Hadean (4)
-
upper Precambrian
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Proterozoic
-
Bitter Springs Formation (1)
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-
-
-
problematic fossils
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problematic microfossils (1)
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remote sensing (1)
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sedimentary rocks
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South America
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Brazil (1)
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spectroscopy (1)
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structural geology (4)
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tectonics
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Bronson Hill Anticlinorium (2)
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California
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Central California (1)
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San Bernardino County California
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Old Woman Mountains (1)
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-
San Joaquin County California (1)
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San Joaquin Valley (1)
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Georgia
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Rabun County Georgia (1)
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Massachusetts
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Franklin County Massachusetts (2)
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Mojave Desert (1)
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New England (3)
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New Hampshire
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Cheshire County New Hampshire (1)
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Grafton County New Hampshire (1)
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New Mexico (2)
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soils
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
Himalayan Leucogranites: A Minimal Role in Deformation Available to Purchase
An Yin: The Reluctant Revolutionary of Himalayan Geology Free
INDEX Available to Purchase
ACKNOWLEDGEMENTS Available to Purchase
PREFACE Available to Purchase
FROM HELL TO THE HIMALAYAS: THERMOCHRONOLOGY ACROSS DEEP TIME Available to Purchase
4. EARLY EARTH Available to Purchase
3. ADVENTURES IN SIMS Available to Purchase
1. EARLY YEARS Open Access
2. THE EMERGENCE OF THERMOCHRONOMETRY Available to Purchase
We don't know when plate tectonics began Available to Purchase
Burke’s Law: Toward a Reasoned Discussion of Deep Time Free
Impact of fault damage on eastern Tibet topography Open Access
Geologic framework of the northern Indo-Burma Ranges and lateral correlation of Himalayan-Tibetan lithologic units across the eastern Himalayan syntaxis Open Access
Secondary magnetic inclusions in detrital zircons from the Jack Hills, Western Australia, and implications for the origin of the geodynamo Available to Purchase
Hadean Zircon Petrochronology Available to Purchase
Differentiated impact melt sheets may be a potential source of Hadean detrital zircon: COMMENT Open Access
From the Hadean to the Himalaya: 4.4 Ga of felsic terrestrial magmatism Available to Purchase
Zircon formation in impact melts: Complications for deciphering planetary impact histories Available to Purchase
We explore the formation conditions and inheritance probability of zircon in impact melts and the implications of using zircon geochronology to investigate planetary impact histories. By modeling the occurrence and crystallization temperature spectrum for zircon in simulated impact melts, we predict the presence of such grains within impactites. We also report U-Pb geochronology of sieve-textured, possibly poikilitic, zircon identified in the pseudotachylyte and granophyre units present within the largest known terrestrial impact crater (Vredefort, South Africa) to explore the accuracy of these grains in dating impact events at an impact structure of known age. Zircons with similar textures have been recently interpreted as growing in an impact melt in lunar meteorite SaU 169 and used to determine the age of the Imbrium impact. Modeling in simulated lunar melt compositions predicts crystallization of zircon in merely ~2% of melting events, in this case via impact. The modeled crystallization temperature spectrum is significantly below Ti-in-zircon crystallization temperatures reported from lunar samples. Zircon formation within an impact melt is dictated by saturation of [Zr] and requires a high abundance for lunar melt compositions. This essentially rules out the possibility of zircon growing in equilibrium with lunar meteorites. Poikilitic textures may be inherited from the lunar crust, presumably due to rapid decompression and/or resorption into an undersaturated magma, as previously recognized in plagioclase. Although either scenario could be due to an impact, endogenic processes cannot be ruled out, and thus lunar poikilitic zircons may not be recording impact melting events. Secondary ion mass spectrometry U-Pb analysis of zircon with similar textures from Vredefort clearly shows that these grains are inherited from the Archean target rocks, with varying degrees of Pb loss, and consequently cannot be used to accurately identify the age of the Vredefort impact structure. Further understanding of the growth and isotopic effects on zircon of shock and heating associated with large impacts could provide another tool that can be used to probe planetary impact histories.
The multi-diffusion domain model: past, present and future Available to Purchase
Abstract It is axiomatic that application of closure theory – the foundation of isotope-based thermochronology – requires an empirical diffusion model. It is therefore surprising that the majority of thermochronological studies have not met this requirement. The advent of the multi-diffusion domain (MDD) model transcended this limitation yielding both diffusion and age information via routine 40 Ar/ 39 Ar step-heating of K-feldspar. Observed correlations between age and Arrhenius spectra show that Ar diffusion occurs by the same mechanisms in nature as in the laboratory. Under certain conditions, these data permit the recovery of a unique, cooling history. The community reaction included some unproductive lines of argument but some stimulated refinements of the MDD model that benefited the development of thermochronology. The MDD model was recently applied to muscovite upon recognition that the same diffusion mechanism operates in vacuum step-heating as in nature. The advent of 40 K– 40 Ca closure profile dating opens up a new thermochronological approach. Initial results confirm that muscovite intragrain defects can restrict effective diffusion length scales in white micas from 10–100 s of microns. Our hope for the future of the MDD model is that it be subject to aggressive and sceptical testing by the community in which quantification is valued over assertion.