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Browsing ELibrary by Title
Now showing items 1474-1493 of 21821
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(2004)Iron(II) minerals have been found to catalyse the formation of pyrophosphate from activated phosphate compounds and inorganic phosphate at near neutral pH in water. Iron(II) phosphate catalyses the formation of pyrophosphate, ...
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(1989)The bottom waters near hydrothermal vents of the Guaymas Basin show a great increase (by a factor of 20 to 130) in the biomass of benthopelagic zooplankton, with copepods predominant. It is most probable that it is these ...
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(2002)Stratotype sections of the Asselian, Sakmarian, Artinskian, and Kungurian stages of the Cisuralian Series of the Permian System, which were studied to meet requirements of the International GSSP project, are considered. ...
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(2001)New detailed zonal scales for the Carnian and Lower Norian in northeast Russia are suggested. On the basis of ammonoids, the following have been distinguished in the Lower Carnian: Stolleyites tenuis zone, beds with ...
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(1999)The Tyumen superdeep borehole (TSB-6) drilled in north-western Siberia was the first that penetrated through Mesozoic deposits and probably entered the uppermost Paleozoic sediments. In the course of drilling, a clear ...
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(2003)Two biostratigraphic zonations, one based on macrofauna (primarily on inocerams and belemnites) and the other one based on microfossils, mostly on benthic foraminifers, are distinguished in the regional scale of the Upper ...
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(2004)Among materials of the OJSC Lukoil obtained in the northern Caspian region, there are cores samples recovered from the depth of 7 to 37 m below bottom, piston cores, and high-resolution seismic profiles. These materials ...
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(2001)Revising Frasnian radiolarians, we established three new radiolarian zones within this stage. These are the Helenifore gogoense-Retisphaera concinna Zone of the lower Frasnian, Moskovistella allbororum-Ceratoikiscum ukhtensis ...
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(2001)The regional stratigraphic scheme suggested for the marine Paleogene deposits in the West Siberian plate is based on investigation results of macro- and microfossils (foraminifers, dinoflagellales, radiolarians, diatomaceous ...
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(1993)General agreement exists that the position of the base of the Cambrian (Precambrian–Cambrian boundary) should coincide with a biostratigraphic marker that can be widely traced and is linked to the evolution of the small ...
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(2004)Acritarchs, the fossilizable, resting cysts of phytoplanktonic algal protists, are the dominant component of marine organic-walled microfossils in the Palaeozoic. The majority of acritarchs show strong similarities with ...
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(1998)Thirteen species of algae covering an extensive range of classes were cultured and stable carbon isotopic compositions of their lipids were analysed in order to assess carbon isotopic fractionation effects during their ...
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(1998)Thirteen species of algae covering an extensive range of classes were cultured and stable carbon isotopic compositions of their lipids were analysed in order to assess carbon isotopic fractionation effects during their ...
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(2002)The transmission of P-waves through the stratified layers of a sedimentary basin is modeled numerically using Biot theory. The effects on the transmissivity of frequency, angle of incidence, layer thickness, perme-ability ...
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(2003)The marine biota of the Arctic paleobiogeographic realm differed from the biota of the Boreal realm in being taxonomically depauperated rather than in having endemics of a high rank (Superrealm). The biota of the West ...
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(2003)The biotic effects of late Maastrichtian mantle plume volcanism on Ninetyeast Ridge and Deccan volcanism mirror those of the Cretaceous-Tertiary (KT) mass extinction and impact event. Planktonic foraminifera responded to ...
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(1999)A comprehensive analysis of taxonomic composition of pre-Riphean silicified and organic-walled microfossils described in publications is performed and dynamics of stromatolite abundance during the Archean and Paleoproterozoic ...
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(1999)Biotite solid-solutions are a significant H 2 O reservoir in the lithosphere, and the assemblage Bt+Opx+Kfs+Qtz is commonly used to estimate a H2O in high-grade metamorphic and magmatic rocks. Here we report experimental ...
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(2005)The effects of elevated pH, ionic strength, and temperature on sediments in the vadose zone are of primary importance in modeling contaminant transport and understanding the environmental impact of tank leakage at nuclear ...
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(1997)The rate and stoichiometry of biotite dissolution were studied in the pH range 2-10 using thin-film continuous flow reactors. The release of interlayer K is relatively fast and becomes diffusion-controlled within a few ...
Now showing items 1474-1493 of 21821