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NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
-
Central Africa
-
Angola (1)
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East Africa
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Kenya (1)
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Lake Turkana (1)
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Mozambique (1)
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East African Lakes
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Lake Turkana (1)
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Gregory Rift (1)
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North Africa
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Tunisia (1)
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Southern Africa
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Botswana (1)
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Namibia
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Damara Belt (2)
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South Africa
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Transvaal region (1)
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Zimbabwe (1)
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West Africa
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Cameroon (1)
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Asia
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Blake Plateau
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Blake Nose (2)
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Cape Verde Basin (1)
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Ceara Rise (2)
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Northeast Atlantic
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Iberian abyssal plain (1)
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Northwest Atlantic
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Demerara Rise (4)
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Rockall Bank (1)
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Rockall Plateau (1)
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Sierra Leone Rise (3)
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South Atlantic
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Angola Basin (6)
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Cape Basin (3)
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Falkland Plateau (2)
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Rio Grande Rise (8)
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Southeast Atlantic (8)
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Ukraine
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Pacific Ocean
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South Pacific
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Lord Howe Rise (1)
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West Pacific
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Russian Platform
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South America
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Argentina (1)
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Brazil
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Minas Gerais Brazil
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Parana Brazil (1)
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Dom Feliciano Belt (1)
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Uruguay (2)
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South Island (1)
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Strait of Gibraltar (1)
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United States
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Texas
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commodities
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brines (1)
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petroleum
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elements, isotopes
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carbon
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C-13/C-12 (13)
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organic carbon (2)
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halogens (1)
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isotope ratios (20)
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isotopes
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radioactive isotopes
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Pb-206/Pb-204 (1)
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stable isotopes
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C-13/C-12 (13)
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Ca-44/Ca-40 (1)
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Nd-144/Nd-143 (3)
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O-18/O-16 (13)
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Pb-206/Pb-204 (1)
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Sr-87/Sr-86 (3)
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metals
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calcium
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Ca-44/Ca-40 (1)
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Mg/Ca (1)
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Sr/Ca (1)
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magnesium
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Mg/Ca (1)
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strontium
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Sr/Ca (1)
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Sr-87/Sr-86 (3)
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lead
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Pb-206/Pb-204 (1)
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platinum group
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iridium (1)
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rare earths
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neodymium
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Nd-144/Nd-143 (3)
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oxygen
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O-18/O-16 (13)
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fossils
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Chordata
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Vertebrata
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Pisces (1)
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Invertebrata
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Arthropoda
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Mandibulata
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Crustacea
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Ostracoda (1)
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Protista
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Foraminifera
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Rotaliina
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Buliminacea
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Bolivinitidae
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Bolivina (1)
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Globigerinacea
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Globigerinidae
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Globigerina
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Globigerina bulloides (1)
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Globigerinoides
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Globigerinoides sacculifer (1)
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Globorotaliidae
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Globorotalia (1)
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microfossils (24)
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palynomorphs (1)
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Plantae
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algae
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Coccolithophoraceae
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Coccolithus (1)
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nannofossils
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thallophytes (2)
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geochronology methods
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Ar/Ar (2)
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paleomagnetism (6)
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geologic age
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Cenozoic
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Quaternary
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Pleistocene
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Tertiary
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Neogene
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lower Miocene (2)
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upper Miocene
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Messinian (1)
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Pliocene (2)
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Paleogene
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Eocene
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lower Eocene
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Ypresian (1)
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Oligocene
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lower Oligocene (2)
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upper Oligocene (1)
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Paleocene
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lower Paleocene
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Danian (2)
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K-T boundary (9)
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upper Paleocene (3)
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Paleocene-Eocene Thermal Maximum (11)
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-
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Mesozoic
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Cretaceous
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Lower Cretaceous
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Albian (2)
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Aptian (3)
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Barremian (1)
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Upper Cretaceous
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Campanian (1)
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Cenomanian (1)
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Coniacian (1)
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K-T boundary (9)
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Maestrichtian
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upper Maestrichtian (1)
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Santonian (1)
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Jurassic
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Lower Jurassic
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Phanerozoic (1)
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Precambrian
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upper Precambrian
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Proterozoic
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Damara System (1)
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Neoproterozoic (1)
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igneous rocks
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igneous rocks
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carbonatites (1)
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kimberlite (1)
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plutonic rocks
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granites
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S-type granites (1)
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ultramafics
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peridotites
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harzburgite (1)
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lherzolite (1)
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volcanic rocks
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rhyolites (1)
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minerals
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carbonates (2)
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magnetite (1)
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manganese oxides (1)
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phosphates
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apatite (1)
-
-
-
Primary terms
-
absolute age (2)
-
Africa
-
Central Africa
-
Angola (1)
-
-
East Africa
-
Kenya (1)
-
Lake Turkana (1)
-
Mozambique (1)
-
-
East African Lakes
-
Lake Turkana (1)
-
-
Gregory Rift (1)
-
North Africa
-
Egypt (1)
-
Tunisia (1)
-
-
Southern Africa
-
Botswana (1)
-
Namibia
-
Damara Belt (2)
-
-
South Africa
-
Transvaal region (1)
-
-
Zimbabwe (1)
-
-
West Africa
-
Cameroon (1)
-
-
-
Asia
-
Indian Peninsula
-
India (2)
-
-
Middle East
-
Israel (1)
-
-
-
Atlantic Ocean
-
Equatorial Atlantic (7)
-
Mid-Atlantic Ridge (2)
-
North Atlantic
-
Bay of Biscay (1)
-
Blake Plateau
-
Blake Nose (2)
-
-
Cape Verde Basin (1)
-
Cape Verde Rise (1)
-
Caribbean Sea
-
Nicaragua Rise (1)
-
-
Ceara Rise (2)
-
Iceland-Faeroe Ridge (1)
-
Northeast Atlantic
-
Iberian abyssal plain (1)
-
-
Northwest Atlantic
-
Demerara Rise (4)
-
-
Rockall Bank (1)
-
Rockall Plateau (1)
-
Sierra Leone Rise (3)
-
-
South Atlantic
-
Angola Basin (6)
-
Brazil Basin (2)
-
Cape Basin (3)
-
Falkland Plateau (2)
-
Rio Grande Rise (8)
-
Southeast Atlantic (8)
-
Vema Channel (1)
-
Walvis Ridge (57)
-
-
West Atlantic (4)
-
-
Atlantic Ocean Islands
-
Tristan da Cunha (3)
-
-
Atlantic region (1)
-
Australasia
-
New Zealand (1)
-
-
biogeography (1)
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brines (1)
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carbon
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C-13/C-12 (13)
-
organic carbon (2)
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-
Cenozoic
-
Quaternary
-
Holocene (1)
-
Pleistocene
-
upper Pleistocene (1)
-
-
-
Tertiary
-
Neogene
-
Miocene
-
lower Miocene (2)
-
upper Miocene
-
Messinian (1)
-
-
-
Pliocene (2)
-
-
Paleogene
-
Eocene
-
lower Eocene
-
Ypresian (1)
-
-
-
Oligocene
-
lower Oligocene (2)
-
upper Oligocene (1)
-
-
Paleocene
-
lower Paleocene
-
Danian (2)
-
K-T boundary (9)
-
-
upper Paleocene (3)
-
-
Paleocene-Eocene Thermal Maximum (11)
-
-
-
-
Chordata
-
Vertebrata
-
Pisces (1)
-
-
-
climate change (12)
-
continental drift (2)
-
continental shelf (2)
-
continental slope (1)
-
crust (6)
-
data processing (1)
-
Deep Sea Drilling Project
-
IPOD
-
DSDP Site 603 (1)
-
Leg 48
-
DSDP Site 400 (1)
-
-
Leg 62
-
DSDP Site 465 (1)
-
-
Leg 71
-
DSDP Site 511 (2)
-
DSDP Site 513 (1)
-
DSDP Site 514 (1)
-
-
Leg 72
-
DSDP Site 516 (2)
-
DSDP Site 517 (1)
-
-
Leg 73
-
DSDP Site 519 (1)
-
DSDP Site 522 (1)
-
DSDP Site 524 (2)
-
-
Leg 74
-
DSDP Site 525 (8)
-
DSDP Site 526 (2)
-
DSDP Site 527 (4)
-
DSDP Site 528 (6)
-
DSDP Site 529 (1)
-
-
Leg 75
-
DSDP Site 530 (5)
-
DSDP Site 531 (1)
-
DSDP Site 532 (1)
-
-
Leg 80
-
DSDP Site 550 (2)
-
-
Leg 81
-
DSDP Site 553 (1)
-
-
Leg 86
-
DSDP Site 577 (4)
-
-
Leg 90
-
DSDP Site 588 (1)
-
-
Leg 93
-
DSDP Site 605 (1)
-
-
-
Leg 14
-
DSDP Site 144 (2)
-
-
Leg 15
-
DSDP Site 151 (1)
-
-
Leg 22
-
DSDP Site 213 (1)
-
-
Leg 24
-
DSDP Site 237 (1)
-
-
Leg 3
-
DSDP Site 17 (1)
-
-
Leg 36
-
DSDP Site 327 (1)
-
DSDP Site 328 (2)
-
-
Leg 39
-
DSDP Site 354 (1)
-
DSDP Site 355 (1)
-
DSDP Site 356 (2)
-
DSDP Site 357 (1)
-
-
Leg 40
-
DSDP Site 360 (1)
-
DSDP Site 361 (3)
-
DSDP Site 362 (2)
-
DSDP Site 363 (2)
-
DSDP Site 364 (2)
-
-
Leg 41
-
DSDP Site 366 (2)
-
DSDP Site 367 (1)
-
DSDP Site 368 (1)
-
-
Leg 43
-
DSDP Site 384 (2)
-
-
-
diagenesis (1)
-
epeirogeny (1)
-
Europe
-
Southern Europe
-
Iberian Peninsula
-
Spain
-
Cantabrian Basin (1)
-
-
-
Italy
-
Umbria Italy
-
Perugia Italy
-
Gubbio Italy (2)
-
-
-
-
-
Ukraine
-
Boltyshka Depression (1)
-
Ukrainian Shield (1)
-
-
Western Europe
-
France
-
Aquitaine (1)
-
-
Iceland
-
Laki (1)
-
-
-
-
faults (2)
-
folds (1)
-
geochemistry (9)
-
geochronology (1)
-
geodesy (1)
-
geophysical methods (10)
-
igneous rocks
-
carbonatites (1)
-
kimberlite (1)
-
plutonic rocks
-
granites
-
S-type granites (1)
-
-
ultramafics
-
peridotites
-
harzburgite (1)
-
lherzolite (1)
-
-
-
-
volcanic rocks
-
basalts
-
flood basalts (1)
-
tholeiite (2)
-
-
rhyolites (1)
-
-
-
inclusions (1)
-
Indian Ocean
-
Agulhas Bank (2)
-
Exmouth Plateau (1)
-
Gascoyne abyssal plain (1)
-
-
Integrated Ocean Drilling Program
-
Expeditions 320/321
-
Expedition 321
-
IODP Site U1337 (1)
-
IODP Site U1338 (1)
-
-
-
-
intrusions (1)
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Crustacea
-
Ostracoda (1)
-
-
-
-
Protista
-
Foraminifera
-
Rotaliina
-
Buliminacea
-
Bolivinitidae
-
Bolivina (1)
-
-
-
Globigerinacea
-
Globigerinidae
-
Globigerina
-
Globigerina bulloides (1)
-
-
Globigerinoides
-
Globigerinoides sacculifer (1)
-
-
-
Globorotaliidae
-
Globorotalia (1)
-
-
-
-
-
-
-
isotopes
-
radioactive isotopes
-
Pb-206/Pb-204 (1)
-
-
stable isotopes
-
C-13/C-12 (13)
-
Ca-44/Ca-40 (1)
-
Nd-144/Nd-143 (3)
-
O-18/O-16 (13)
-
Pb-206/Pb-204 (1)
-
Sr-87/Sr-86 (3)
-
-
-
lava (1)
-
magmas (1)
-
mantle (8)
-
maps (2)
-
marine geology (3)
-
Mediterranean Sea (1)
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous
-
Albian (2)
-
Aptian (3)
-
Barremian (1)
-
-
Upper Cretaceous
-
Campanian (1)
-
Cenomanian (1)
-
Coniacian (1)
-
K-T boundary (9)
-
Maestrichtian
-
upper Maestrichtian (1)
-
-
Santonian (1)
-
Senonian (2)
-
-
-
Jurassic
-
Lower Jurassic
-
Toarcian (1)
-
-
-
-
metals
-
alkaline earth metals
-
calcium
-
Ca-44/Ca-40 (1)
-
Mg/Ca (1)
-
Sr/Ca (1)
-
-
magnesium
-
Mg/Ca (1)
-
-
strontium
-
Sr/Ca (1)
-
Sr-87/Sr-86 (3)
-
-
-
lead
-
Pb-206/Pb-204 (1)
-
-
platinum group
-
iridium (1)
-
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (3)
-
-
-
-
Mohorovicic discontinuity (1)
-
nodules (1)
-
North America
-
Western Interior
-
Western Interior Seaway (2)
-
-
-
Northern Hemisphere (1)
-
ocean basins (1)
-
ocean circulation (2)
-
Ocean Drilling Program
-
Leg 108
-
ODP Site 664 (1)
-
ODP Site 667 (1)
-
-
Leg 112
-
ODP Site 688 (1)
-
-
Leg 113
-
ODP Site 689 (1)
-
ODP Site 690 (3)
-
-
Leg 114
-
ODP Site 699 (1)
-
ODP Site 700 (1)
-
ODP Site 702 (1)
-
ODP Site 704 (1)
-
-
Leg 115
-
ODP Site 709 (1)
-
ODP Site 714 (1)
-
-
Leg 120
-
ODP Site 748 (1)
-
-
Leg 121
-
ODP Site 752 (2)
-
-
Leg 122
-
ODP Site 761 (1)
-
-
Leg 123
-
ODP Site 766 (1)
-
-
Leg 149
-
ODP Site 897 (1)
-
-
Leg 154
-
ODP Site 925 (1)
-
ODP Site 926 (1)
-
ODP Site 927 (1)
-
ODP Site 929 (1)
-
-
Leg 159
-
ODP Site 959 (1)
-
ODP Site 960 (1)
-
ODP Site 961 (1)
-
-
Leg 162
-
ODP Site 982 (1)
-
-
Leg 165
-
ODP Site 1000 (1)
-
-
Leg 171B
-
ODP Site 1049 (1)
-
ODP Site 1051 (1)
-
-
Leg 175
-
ODP Site 1082 (1)
-
ODP Site 1083 (1)
-
-
Leg 177
-
ODP Site 1088 (1)
-
ODP Site 1089 (1)
-
ODP Site 1090 (2)
-
ODP Site 1091 (1)
-
ODP Site 1092 (1)
-
ODP Site 1093 (1)
-
ODP Site 1094 (1)
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Walvis Ridge
The carbonate compensation depth in the South Atlantic Ocean since the Late Cretaceous
Calcium isotope composition of Morozovella over the late Paleocene–early Eocene
Hotspot origin for asymmetrical conjugate volcanic margins of the austral South Atlantic Ocean as imaged on deeply penetrating seismic reflection lines
Subtropical sea-surface warming and increased salinity during Eocene Thermal Maximum 2
A new high-resolution chronology for the late Maastrichtian warming event: Establishing robust temporal links with the onset of Deccan volcanism
Alternating Southern and Northern Hemisphere climate response to astronomical forcing during the past 35 m.y.
The Eocene Thermal Maximum 3: Reading the environmental perturbations at Gubbio (Italy)
The Paleocene–early Eocene interval is punctuated by a series of transient warming events known as hyperthermals that have been associated with changes in the carbon isotope composition of the ocean-atmosphere system. Here we present and discuss a detailed record of calcareous nannofossil and foraminiferal assemblages coupled with high-resolution geochemical, isotopic, and environmental magnetic records across the middle Ypresian at the Contessa Road section (Gubbio, Italy). This allows characterization of the Eocene Thermal Maximum 3 (ETM3, K or X) and recognition of four minor (I1, I2, J, L) hyperthermals. At the Contessa Road section, the ETM3 is marked by short-lived negative excursions in both δ 13 C and δ 18 O, pronounced changes in rock magnetic properties, and calcium carbonate reduction. These changes coupled with the moderate to low state of preservation of calcareous nannofossils and planktonic foraminifera, higher FI and agglutinated foraminifera values, along with a lower P/(P + B) ratio (P—planktonic; B—benthic) and coarse fractions provide evidence of enhanced carbonate dissolution during the ETM3. A marked shift toward warmer and more oligotrophic conditions has been inferred that suggests unstable and perturbed environmental conditions both in the photic zone and at the seafloor.
Southeastern Atlantic deep-water evolution during the late-middle Eocene to earliest Oligocene (Ocean Drilling Program Site 1263 and Deep Sea Drilling Project Site 366)
Partial collapse of the marine carbon pump after the Cretaceous-Paleogene boundary
Postrift depositional evolution and sequence stratigraphy from offshore subsurface data of the Kribi-Campo subbasin (Cameroon, West African margin)
Jianshuiite in oceanic manganese nodules at the Paleocene-Eocene boundary
Morphological Change During The Ontogeny Of The Planktic Foraminifera
The role of regional survivor incumbency in the evolutionary recovery of calcareous nannoplankton from the Cretaceous/Paleogene (K/Pg) mass extinction
South Atlantic opening: A plume-induced breakup?
Tracking the Tristan-Gough mantle plume using discrete chains of intraplate volcanic centers buried in the Walvis Ridge
Crustal structure of northwest Namibia: Evidence for plume-rift-continent interaction
Saline Indian Ocean waters invaded the South Atlantic thermocline during glacial termination II
Effects of Deccan volcanism on paleoenvironment and planktic foraminifera: A global survey
Deccan volcanism, one of Earth's largest flood basalt provinces, erupted ~80% of its total volume (phase 2) during a relatively short time in the uppermost Maastrichtian paleomagnetic chron C29r and ended with the Cretaceous-Tertiary boundary mass extinction. Full biotic recovery in the marine realm was delayed at least 500 k.y. or until after the last Deccan eruptions in C29n (phase 3, 14% of the total Deccan volume). For over 30 yr, the mass extinction has been commonly attributed to the Chicxulub impact, and the delayed recovery remained an enigma. Here, we demonstrate that the two phases of Deccan volcanism can account for both the mass extinction and delayed marine recovery. In India, a direct correlation between Deccan eruptions (phase 2) and the mass extinction reveals that ~50% of the planktic foraminifer species gradually disappeared during volcanic eruptions prior to the first of four lava megaflows, reaching ~1500 km across India, and out to the Bay of Bengal. Another 50% disappeared after the first megaflow, and the mass extinction was complete with the last megaflow. Throughout this interval, blooms of the disaster opportunist Guembelitria cretacea dominate shallow-marine assemblages in coeval intervals from India to the Tethys and the Atlantic Oceans to Texas. Similar high-stress environments dominated by blooms of Guembelitria and/or Globoconusa are observed correlative with Deccan volcanism phase 3 in the early Danian C29n, followed by full biotic recovery after volcanism ended. The mass extinction and high-stress conditions may be explained by the intense Deccan volcanism leading to rapid global warming and cooling in C29r and C29n, enhanced weathering, continental runoff, and ocean acidification, resulting in a carbonate crisis in the marine environment.
The early Danian hyperthermal event at Boltysh (Ukraine): Relation to Cretaceous-Paleogene boundary events
The Boltysh meteorite impact crater formed in the Ukrainian Shield on the margin of the Tethys Ocean a few thousand years before the Cretaceous-Paleogene boundary and was rapidly filled by a freshwater lake. Sediments filling the lake vary from early lacustrine turbidites and silts to ~300 m of fine silts, organic carbon–rich muds, oil shales, and lamenites that record early Danian terrestrial climate signals at high temporal resolution. Combined carbon isotope and palynological data show that the fine-grained organic carbon–rich lacustrine sediments preserve a uniquely complete and detailed negative carbon isotope excursion in an expanded section of several hundred meters. The position of the carbon isotope excursion in the early Danian stage of the Paleogene period, around 200 k.y. above the Cretaceous-Paleogene boundary, leads us to correlate it to the Dan-C2 carbon isotope excursion recorded in marine sediments of the same age. The more complete Boltysh carbon isotope excursion record indicates a δ 13 C shift of around -3‰, but also a more extended recovery period, strikingly similar in pattern to the highest fidelity carbon isotope excursion records available for the Toarcian and Paleocene-Eocene hyperthermal events. Changes in floral communities through the carbon isotope excursion recorded at Boltysh reflect changing biomes caused by rapidly warming climate, followed by recovery, indicating that this early Danian hyperthermal event had a similar duration to the Toarcian and Paleocene-Eocene events.
Atmospheric halogen and acid rains during the main phase of Deccan eruptions: Magnetic and mineral evidence
Environmental changes linked to Deccan volcanism are still poorly known. A major limitation resides in the paucity of direct Deccan volcanism markers and in the geologically short interval where both impact and volcanism occurred, making it hard to evaluate their contributions to the mass extinction. We investigated the low-magnetic-susceptibility interval just below the iridium-rich layer of the Bidart (France) section, which was recently hypothesized to be the result of paleoenvironmental perturbations linked to paroxysmal Deccan phase 2. Results show a drastic decrease of detrital magnetite and presence of scarce akaganeite, a hypothesized reaction product formed in the aerosols derived from reaction of a volcanic plume with water and oxygen in the high atmosphere. A weathering model of the consequences of acidic rains on a continental regolith reveals nearly complete magnetite dissolution after ~31,000 yr, which is consistent with our magnetic data and falls within the duration of the Deccan phase 2. These results highlight the nature and importance of the Deccan-related environmental changes leading up to the end- Cretaceous mass extinction.