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Browsing ELibrary by Title
Now showing items 6494-6513 of 21253
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(2002)A fossil of Libralces gallicus Azzaroli from the Khaprovian beds of the Liventsovka locality (lower course of the Don River, Middle Villafranchian) is redescribed. The proportions of the antler beams and small measurements ...
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(2003)We used 13C values to identify lichen metabolism in the globally distributed Early Devonian (409-386 Ma) macrofossil Spongiophyton minutissimum, which had been alternatively interpreted as a green plant of bryophyte grade ...
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(2002)A new genus, Flabellitha Krassilov et Jurina, gen. nov., is described based on leaflike flabellate fossils from the Givetian of central Kazakhstan. Microstructural characters suggest its affinity with foliose lichens. This ...
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(2002)Synthetic aegirine LiFeSi2O6 and NaFeSi2O6 were characterized using infrared spectroscopy in the frequency range 50–2000 cm−1, and at temperatures between 20 and 300 K. For the C2/c phase of LiFeSi2O6, 25 of the 27 predicted ...
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(2000)This laboratory study attempted to delineate the processes of iron oxide particle release from a sandy aquifer as influenced by electrostatic repulsion and chemical dissolution. The release of ferrihydrite particles by 5 ...
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LIGHT ELEMENT GEOCHEMISTRY OF THE TAGISH LAKE C12 CHONDRITE: COMPARISON WITH CI1 AND CM2 METEORITES (2002)We have studied the carbon and nitrogen stable isotope geochemistry of a small pristine sample of the Tagish Lake carbonaceous chondrite by high-resolution stepped-combustion mass spectrometry, and compared the results ...
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(2005)Light-induced degradation in realgar (arsenic sulfide) has been studied by means of four-circle single-crystal X-ray diffraction and X-ray photoelectron spectroscopy. Because of the alteration of realgar exposed to light, ...
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(2003)Ancient limestone-marl alternations are concentrated in settings analogous to loci of aragonite accumulation in the modern world. They typically occur on shelves in the tropical-subtropical climate belt, are far more ...
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(1997)It is increasingly accepted, through the use of geochemical arguments, that the Earth's mantle has a two-layer structure, comprising an upper and lower mantle. Estimates of the exchange of matter and energy between these ...
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(2002)Density of proton active surface sites at mineral surfaces is a property of fundamental importance in equilibrium modeling of surface complexation reactions. In this article, methods for an experimental determination of ...
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(2003)In the case of propagation of plane elastic waves in anisotropic gyrotropic media, Christoffel tensor is complex; its real part contains stiffnesses and an imaginary part includes components of the fifth-rank gyration ...
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(2002)A major limitation in the analysis of physical quantities measured from a stratigraphic core is incomplete knowledge of the depth to age relationship for the core. Records derived from diverse locations are often compared ...
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(1996)Geochemical arguments for a layered mantle based upon both lithophile and rare gas element abundances are well established. The negative Clayperon slope, associated with phase changes at 670 km, is expected to impede ...
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(1996)Geochemical arguments for a layered mantle based upon both lithophile and rare gas element abundances are well established. The negative Clayperon slope, associated with phase changes at 670 km, is expected to impede ...
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(2000)Structurally preserved pistillate heads from the Upper Cretaceous of Eastern Siberia are described and assigned to a new genus Lindacarpa N. Maslova gen. nov. (Hamamelidaceae) The question of the morphological divergence ...
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(1989)The linear fold tectonics that determines the structural look of the continental crust expresses a P-T regime of the crust that assumes the presence of a thick 'load-bearing' mesozonal layer (with a temperature range of ...
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(2000)In a continuous binary solution, the partition coefficient, expressed as a ratio of mole fractions of one component in two phases, is linear against the composition of one of the phases (the numerator phase) if the exchange ...
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(2003)The rainfall-runoff process is widely perceived as being non-linear; however, the degree of non-linearity might not be significant in hydrologic time series. Evidence of non-linearity was reported in the past in the detrended ...
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(2004)It has been suggested that the release of clathrates rather than expansion of wetlands is the primary cause of the rapid increases observed in the ice-core atmospheric methane record during the Pleistocene. Because submarine ...
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(1997)Previously published microscopic observations of the heterogeneous oxidation of Mn(II) at hematite and albite surfaces were used to develop rate expressions that model the changes in solution composition during oxidation ...
Now showing items 6494-6513 of 21253