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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Southern Africa
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South Africa
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Cape fold belt (2)
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-
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Antarctica
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Antarctic ice sheet
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West Antarctic ice sheet (3)
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Antarctic Peninsula (3)
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Ellsworth Land
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Ellsworth Mountains (19)
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Marie Byrd Land (1)
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South Shetland Islands
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King George Island (1)
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Transantarctic Mountains
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Horlick Mountains
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Ohio Range (1)
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Pensacola Mountains (1)
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West Antarctica (8)
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Atlantic Ocean Islands
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Falkland Islands (1)
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Pacific region (1)
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Scotia Sea Islands
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South Shetland Islands
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King George Island (1)
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-
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South America
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Argentina
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Buenos Aires Argentina
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Sierras Australes (1)
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Falkland Islands (1)
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Patagonia (1)
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Southern Ocean
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Weddell Sea (3)
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United States
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Utah (1)
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elements, isotopes
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isotope ratios (5)
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isotopes
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radioactive isotopes
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Be-10 (1)
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Pb-206/Pb-204 (1)
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Pb-207/Pb-204 (1)
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Pb-208/Pb-204 (1)
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Sm-147/Nd-144 (1)
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stable isotopes
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Hf-177/Hf-176 (2)
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Nd-144/Nd-143 (3)
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O-18/O-16 (1)
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Pb-206/Pb-204 (1)
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Pb-207/Pb-204 (1)
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Pb-207/Pb-206 (1)
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Pb-208/Pb-204 (1)
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Pb-208/Pb-206 (1)
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Sm-147/Nd-144 (1)
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Sr-87/Sr-86 (2)
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metals
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alkaline earth metals
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beryllium
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Be-10 (1)
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strontium
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Sr-87/Sr-86 (2)
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hafnium
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Hf-177/Hf-176 (2)
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lead
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Pb-206/Pb-204 (1)
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Pb-207/Pb-204 (1)
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Pb-207/Pb-206 (1)
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Pb-208/Pb-204 (1)
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Pb-208/Pb-206 (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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Sm-147/Nd-144 (1)
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samarium
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Sm-147/Nd-144 (1)
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oxygen
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O-18/O-16 (1)
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fossils
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Invertebrata
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Archaeocyatha (1)
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Arthropoda
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Trilobitomorpha
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Trilobita (1)
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geochronology methods
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exposure age (1)
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U/Pb (7)
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geologic age
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Cenozoic
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Quaternary
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upper Quaternary (1)
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Jurassic
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Paleozoic
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lower Paleozoic (2)
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igneous rocks
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plutonic rocks
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granites (4)
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metamorphic rocks
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minerals
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silicates
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orthosilicates
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nesosilicates
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zircon group
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zircon (6)
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Primary terms
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absolute age (7)
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Africa
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Southern Africa
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South Africa
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Cape fold belt (2)
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-
-
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Antarctica
-
Antarctic ice sheet
-
West Antarctic ice sheet (3)
-
-
Antarctic Peninsula (3)
-
Ellsworth Land
-
Ellsworth Mountains (19)
-
-
Marie Byrd Land (1)
-
South Shetland Islands
-
King George Island (1)
-
-
Transantarctic Mountains
-
Horlick Mountains
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Ohio Range (1)
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Pensacola Mountains (1)
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West Antarctica (8)
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Atlantic Ocean Islands
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Falkland Islands (1)
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biogeography (1)
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Cenozoic
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Quaternary
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upper Quaternary (1)
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Tertiary
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glacial geology (3)
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igneous rocks
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plutonic rocks
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granites (4)
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Invertebrata
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Archaeocyatha (1)
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Arthropoda
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Trilobitomorpha
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Trilobita (1)
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isotopes
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radioactive isotopes
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Be-10 (1)
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Pb-206/Pb-204 (1)
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Pb-207/Pb-204 (1)
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Pb-208/Pb-204 (1)
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Sm-147/Nd-144 (1)
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-
stable isotopes
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Hf-177/Hf-176 (2)
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Nd-144/Nd-143 (3)
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O-18/O-16 (1)
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Pb-206/Pb-204 (1)
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Pb-207/Pb-204 (1)
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Pb-207/Pb-206 (1)
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Pb-208/Pb-204 (1)
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Pb-208/Pb-206 (1)
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Sm-147/Nd-144 (1)
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Sr-87/Sr-86 (2)
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magmas (1)
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mantle (1)
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maps (1)
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Mesozoic
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Cretaceous
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Lower Cretaceous
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Albian (1)
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Aptian (1)
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Jurassic
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Lower Jurassic
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Toarcian (1)
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Triassic
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Upper Triassic
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Carnian (1)
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Rhaetian (1)
-
-
-
-
metals
-
alkaline earth metals
-
beryllium
-
Be-10 (1)
-
-
strontium
-
Sr-87/Sr-86 (2)
-
-
-
hafnium
-
Hf-177/Hf-176 (2)
-
-
lead
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-207/Pb-206 (1)
-
Pb-208/Pb-204 (1)
-
Pb-208/Pb-206 (1)
-
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (3)
-
Sm-147/Nd-144 (1)
-
-
samarium
-
Sm-147/Nd-144 (1)
-
-
-
-
metamorphic rocks
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metasedimentary rocks (1)
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metavolcanic rocks (1)
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quartzites (2)
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metamorphism (2)
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orogeny (2)
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oxygen
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O-18/O-16 (1)
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Pacific region (1)
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paleoclimatology (1)
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paleogeography (9)
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paleontology (2)
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Paleozoic
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Cambrian
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Upper Cambrian (2)
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Carboniferous (2)
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Devonian (2)
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lower Paleozoic (2)
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Ordovician (1)
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Permian
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Buckley Formation (1)
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Upper Permian (1)
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upper Paleozoic (1)
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plate tectonics (4)
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Precambrian
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upper Precambrian
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Proterozoic
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Mesoproterozoic
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Neoproterozoic (2)
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Paleoproterozoic
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Orosirian (1)
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sea-level changes (2)
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sedimentary petrology (3)
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conglomerate (3)
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sedimentary structures
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sediments
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South America
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Buenos Aires Argentina
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siltstone (1)
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sedimentary structures
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sediments
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sediments
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clastic sediments
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pebbles (1)
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siliciclastics (1)
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Ellsworth Mountains
U–Pb isotopic ages and provenance of some far-travelled exotic pebbles from glaciogenic sediments of the Polonez Cove Formation (Oligocene, King George Island)
Tracking voluminous Permian volcanism of the Choiyoi Province into central Antarctica
Provenance and age constraints of Paleozoic siliciclastic rocks from the Ellsworth Mountains in West Antarctica, as determined by detrital zircon geochronology
Precise U-Pb zircon ages and geochemistry of Jurassic granites, Ellsworth-Whitmore terrane, central Antarctica
Permo-Carboniferous conglomerates in the Trinity Peninsula Group at View Point, Antarctic Peninsula: sedimentology, geochronology and isotope evidence for provenance and tectonic setting in Gondwana
Deglacial history of the West Antarctic Ice Sheet in the Weddell Sea embayment: Constraints on past ice volume change: COMMENT
Deglacial history of the West Antarctic Ice Sheet in the Weddell Sea embayment: Constraints on past ice volume change: REPLY
Deglacial history of the West Antarctic Ice Sheet in the Weddell Sea embayment: Constraints on past ice volume change
Combined U-Pb geochronology and Hf isotope geochemistry of detrital zircons from early Paleozoic sedimentary rocks, Ellsworth-Whitmore Mountains block, Antarctica
Basement evolution of the Sierra de la Ventana Fold Belt: new evidence for Cambrian continental rifting along the southern margin of Gondwana
The role of crustal and mantle sources in the genesis of granitoids of the Antarctic Peninsula and adjacent crustal blocks
Tectonic history of the Ellsworth Mountains, West Antarctica: Reconciling a Gondwana enigma
Evidence for Cambrian deformation in the Ellsworth-Whitmore Mountains terrane, Antarctica: Stratigraphic and tectonic implications: Comment and Reply
Evidence for Cambrian deformation in the Ellsworth-Whitmore Mountains terrane, Antarctica: Stratigraphic and tectonic implications
Stratigraphic evidence for the Ross orogeny in the Ellsworth Mountains, West Antarctica: Implication for the evolution of the paleo-Pacific margin of Gondwana
Two thick sequences of ancient glacial and glacial marine rocks, the late Proterozoic Mineral Fork Formation of Utah and the Late Paleozoic Whiteout Conglomerate of West Antarctica, reflect similarities and differences in temperature regimes of the glacial delivery systems, climatic settings in the zones of ablation, and nature of the glacier interfaces with the depositional environments. Both units attain thicknesses of about 1,000 m and both are segments of widely distributed glacigenic deposits covering thousands of km 2 . They appear to represent significant erosion of platformal areas beneath basal ice at or near its melting point. In the Mineral Fork Formation, facies patterns indicate supraglacial melt-out, sediment gravity flow, and deposition from meltwater streams, all characteristic of glacier ice where the climate is subpolar or temperate in the zone of ablation. The vertical sequence, which includes subglacial tills, supraglacial melt-out facies, and a complex glacial marine facies, indicates multiple advances of a grounded ice sheet along the margin of a craton, and final retreat accompanied by a marine transgression. In contrast, the Whiteout Conglomerate lacks facies indicative of supraglacial melting; the absence of meltwater-generated fluvial and plume deposits is especially striking. Rather, subglacial melt-out from grounded ice and basal melting of ice shelves and perhaps icebergs, all accompanied by vertical settling, are indicated. Lateral changes represent a regional transition from grounded marine-based glaciers at the pressure melting point in the basal zone to a shelf of polar ice warmed sufficiently at the base to release sediment there by melting as well as by iceberg calving. The study of thick ancient glacigenic sequences accumulated on subsiding continental margins provides information not yet obtainable from sedimentary piles of Quaternary age.