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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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East African Rift (2)
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Southern Africa
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South Africa
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Cape fold belt (1)
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Antarctica
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Marie Byrd Land
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Asia
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North America
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Pacific Ocean
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commodities
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oxygen
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fossils
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microfossils (2)
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Primary terms
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absolute age (11)
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Africa
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East African Rift (2)
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Southern Africa
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South Africa
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Cape fold belt (1)
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Antarctica
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Amundsen Sea (7)
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Asia
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Leg 28
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Invertebrata
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Potential fields as a tool to characterize the inaccessible areas of the earth: The case of Pine Island–Ellsworth Mountains area, West Antarctica
A tectonostratigraphic framework for the late Mesoproterozoic Bylot basins of Laurentia
Covariation of Deep Antarctic Pacific Oxygenation and Atmospheric CO 2 during the Last 770 kyr
A significant acceleration of ice volume discharge preceded a major retreat of a West Antarctic paleo–ice stream
Icequake streaks linked to potential mega-scale glacial lineations beneath an Antarctic ice stream
Geodynamic models of the West Antarctic Rift System: Implications for the mantle thermal state
Episodicity within a mid-Cretaceous magmatic flare-up in West Antarctica: U-Pb ages of the Lassiter Coast intrusive suite, Antarctic Peninsula, and correlations along the Gondwana margin
Abstract The West Antarctic Ice Sheet overlies the West Antarctic Rift System about which, due to the comprehensive ice cover, we have only limited and sporadic knowledge of volcanic activity and its extent. Improving our understanding of subglacial volcanic activity across the province is important both for helping to constrain how volcanism and rifting may have influenced ice-sheet growth and decay over previous glacial cycles, and in light of concerns over whether enhanced geothermal heat fluxes and subglacial melting may contribute to instability of the West Antarctic Ice Sheet. Here, we use ice-sheet bed-elevation data to locate individual conical edifices protruding upwards into the ice across West Antarctica, and we propose that these edifices represent subglacial volcanoes. We used aeromagnetic, aerogravity, satellite imagery and databases of confirmed volcanoes to support this interpretation. The overall result presented here constitutes a first inventory of West Antarctica’s subglacial volcanism. We identified 138 volcanoes, 91 of which have not previously been identified, and which are widely distributed throughout the deep basins of West Antarctica, but are especially concentrated and orientated along the >3000 km central axis of the West Antarctic Rift System.