11245 to 11256 of 14026 results
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159 Ma Kjakebeinet lamproites (Dronning Maud Land, Antarctica) and their implications for Gondwana breakup processes
Read more of: 159 Ma Kjakebeinet lamproites (Dronning Maud Land, Antarctica) and their implications for Gondwana breakup processesLamproite dykes that cross-cut Middle Jurassic Karoo-related flood basalts in Vestfjella, Dronning Maud Land, Antarctica, have been dated at 158.7 ± 1.6 Ma by 40Ar/39Ar incremental heating of phlogopite. Compared […]
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Winds and tides in the mid-latitude Southern Hemisphere upper mesosphere recorded with the Falkland Islands SuperDARN radar
Read more of: Winds and tides in the mid-latitude Southern Hemisphere upper mesosphere recorded with the Falkland Islands SuperDARN radarMeteor wind data from the first year of operation of the Falkland Islands SuperDARN radar (52° S, 59° W) are used to characterize the atmospheric tides and background winds in […]
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Comparison of analytical methods used for measuring major ions in the EPICA Dome C (Antarctica) ice core
Read more of: Comparison of analytical methods used for measuring major ions in the EPICA Dome C (Antarctica) ice coreIn the past, ionic analyses of deep ice cores tended to consist of a few widely spaced measurements that indicated general trends in concentration. The ion-chromatographic methods widely used provide […]
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A new species of Diaphana from bathyal depths in the Weddell Sea, Antarctica and first record of Diaphana inflata (Strebel, 1908) in the high Antarctic (Gastropoda: Opisthobranchia)
Read more of: A new species of Diaphana from bathyal depths in the Weddell Sea, Antarctica and first record of Diaphana inflata (Strebel, 1908) in the high Antarctic (Gastropoda: Opisthobranchia)Diaphana haini n.sp. is described from Antarctica. With a depth range from about 400 to 2100 m, D. haini is the second Antarctic species of this genus to extend into […]
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The shelled Magellanic Mollusca: with special reference to biogeographic relations in the Southern Ocean
Read more of: The shelled Magellanic Mollusca: with special reference to biogeographic relations in the Southern Ocean[Please note that the PDF file available is is a copy of the original PhD thesis, submitted to the University of Hamburg in 2000. It contains the same content as […]
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Tectonic setting of primitive magmas in volcanic arcs: an example from the Antarctic Peninsula
Read more of: Tectonic setting of primitive magmas in volcanic arcs: an example from the Antarctic PeninsulaPrimitive magmas representing mantle partial melts minimally affected by fractionation and assimilation are rare in the magmatic arc environment. Most examples are either associated with high rates of arc-parallel extension, […]
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The abundance and biomass of choanoflagellates and other nanoflagellates in waters of contrasting temperature to the north-west of South Georgia in the Southern Ocean
Read more of: The abundance and biomass of choanoflagellates and other nanoflagellates in waters of contrasting temperature to the north-west of South Georgia in the Southern OceanThe abundance and biomass of different categories of autotrophic and heterotrophic nanoflagellates were determined in surface waters along a transect crossing the Polar Front to the north-west of South Georgia […]
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The biology and evolution of Antarctic saline lakes in relation to salinity and trophy
Read more of: The biology and evolution of Antarctic saline lakes in relation to salinity and trophyFive brackish to hypersaline lakes (Highway, Ace, Pendent, Williams and Rookery) in the Vestfold Hills, eastern Antarctica were investigated during the austral summer of 1999/2000. The aims were to characterise […]
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Data report: Strontium isotope dating of barnacle fragments: Antarctic Peninsula Site 1103
Read more of: Data report: Strontium isotope dating of barnacle fragments: Antarctic Peninsula Site 1103Strontium isotope ratios from multiple plates of two barnacle fragments from Site 1103 (Ocean Drilling Program Leg 178) provide maximum age estimates for the oldest glacial sedimentary package drilled. Three […]
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Tectonic evolution of the Pacific margin of Antarctica. 1. Late Cretaceous tectonic reconstructions
Read more of: Tectonic evolution of the Pacific margin of Antarctica. 1. Late Cretaceous tectonic reconstructionsWe present new Late Cretaceous tectonic reconstructions of the Pacific margin of Antarctica based on constraints from marine magnetic data and regional free-air gravity fields. Results from interpretation of new […]
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The effect of Forbush decreases on tropospheric parameters over South Pole
Read more of: The effect of Forbush decreases on tropospheric parameters over South PoleEgorova et al. (2000) conclude that Forbush decreases (FDs) in galactic cosmic rays have a significant effect on the atmosphere at Antarctic station Vostok (78.5°S, 106.9°E) via the mechanism of […]