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Now showing items 21-40 of 143
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(2001)A new box model for the global carbon-calcium-strontium cycle is developed to simulate the evolution of Cretaceous and Cenozoic seawater and atmosphere. The model accounts for carbon masses in ocean and atmosphere, in ...
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(2002)These last 10 years, numerical models of mantle convection have emphasized the role of the 670 km endothermic phase change in generating avalanches that trigger catastrophic mass transfers between upper and lower mantle. ...
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(2003)The Sutai Range is a structural and topographic culmination at the southeastern end of the Mongolian Altai and a world-class example of an actively forming restraining bend. The range occurs at a major stepover zone along ...
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(2004)In recent years, it has become popular to attribute faunal change and mass extinction to impacts, volcanic eruptions, or climatic change. How well do these supposed causes compare to the excellent record of Cenozoic life, ...
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(2000)The silicate fractions of recent pelagic sediments in the central north Pacific Ocean are dominated by eolian dust derived from central Asia. An 11 Myr sedimentary record at ODP Sites 885/886 at 44.7 degrees N, 168.3 degrees ...
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(1989)There exists an enormous literature on the evolution of acidic magmas in the zone of contact of sialic rocks with intruded mafic melts. It is generally thought that the resulting contact melting is likely to be important ...
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(2001)The main stages of deformation of Meso-Cenozoic age of the Crimean peninsula were identified on the basis of structure-parageneses and kinematic analyses of cracks and glide planes. The Late-Jurassic age of the Karadag ...
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(2001)The main deformation stages of Mesozoic-Cenozoic deposits in the Crimean Peninsula were identified on the basis of structural-paragenetic and kinematic analyses of cracks and glide planes. The Late-Jurassic age of the ...
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(1999)Oxygen isotope records of planktonic foraminifera indicate that Late Eocene and Oligocene tropical sea surface temperatures were as much as 8°C lower than present at a time when high latitude sea surface temperatures were ...
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(2002)Periods of relatively uniform plate motion were interrupted several times throughout the Cenozoic and Mesozoic by rapid plate reorganization events [R. Hey, Geol. Soc. Am. Bull. 88 (1977) 1404-1420; P.A. Rona, E.S. Richardson, ...
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(2002)Late Cenozoic volcanic centers throughout the Bering Sea region of Alaska consist of small-volume eruptions of flows and cones of tholeiitic to alkaline basalt. Peridotite (spinel lherzolite, websterite, wehrlite, and ...
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(1989)The wedgelike shape of the Komandorskaya Basin in plan view, the distribution of thicknesses of the sedimentary mantle and its structure, the characteristic topography of the basement in the region, the crustal structure ...
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(1990)Investigations done in the northern Caspian Sea more than 20 years ago have defined the general structure of the Jurassic-Cretaceous and Cenozoic deposits, but information on older complexes was lacking until recently. In ...
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(2004)Direct observations of fractures and tectonic jointing are crucial for the study of fault systems in any region. They provide information needed for the mapping of the internal structure of fault zones, determination of ...
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(1988)Characteristic features of Late Cenozoic volcanics fringing the Komandor Basin, Bering Sea, are the lateral compositional inhomogeneity, expressed in their enrichment in high-charge lithophile and light rare-earth elements, ...
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(1988)Finds of garnet peridotite xenoliths in Cenozoic volcanics are fairly rare. Until recently, only three such finds were known on the Vitim plateau, in Pliocene rocks of the Kandiduskha and the Yasha paleo-volcanoes. We give ...
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(1993)A suite of large and fresh peridotite xenoliths from a picrite tuff deposit in the Cenozoic Vitim volcanic field, {small tilde}200 km east of Lake Baikal, shows a continuous gradation from protogranular spinel through ...
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(1990)The Dnieper-Donets paleorift (DDR) of Late Devonian age is a typical province of continental, subalkalic and alkalic volcanism that was similar in its principal parameters to the volcanism of classical Cenozoic rift zones. ...
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(2003)To reveal chemical fractionation during porcellanitization, we have examined chemical compositions of porcellanite clasts and their host sediments from DSDP sites 164 and 166. Porcellanite is an intermediate product during ...
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(2004)We have determined the major and trace element compositions of 176 individual microtektites/spherules from the Australasian, Ivory Coast, and North American microtektite and clinopyroxene-bearing (cpx) spherule layers. ...
Now showing items 21-40 of 143