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Browsing ELibrary by Title
Now showing items 8344-8363 of 21936
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(2002)Notwithstanding an increase in the number of characters used in phylogenetic computer programs, cladograms produced by these methods remain debatable. There is a need to examine the phylogenetic significance of particular ...
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(2003)An isolated maxillary tooth and opisthocoelous anterior thoracic or posterior cervical vertebral centrum of a duck-billed dinosaur, Hadrosauroidea indet., are described. These parts originate from the marine Albian-Cenomanian ...
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(2002)New nonmineralized gemmating dimorphic microorganisms have been discovered in the Lakhanda Group at the base of the Upper Riphean (ca. 1.025 Ga) of the Uchuro-Maiskii region of southeastern Siberia. The daughter buds are ...
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(2003)Body chamber molds of representatives of the genus Proplanulites have been found from the lower part of the koenigi Zone (lower Callovian) of the Kursk Region that contain aptychi of Praestriaptychus koenigi parasp. nov. ...
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(1989)The analysis of geological and geophysical data on Late-Cenezoic rift zones indicates that the anomalous mantle occurring in asthenospheric upwellings beneath these rift zones has a relatively low density, this being ...
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(2002)In addition to large amounts of fragmented country rocks, maar-diatreme volcanoes commonly eject juvenile lapilli and cauliflower bombs containing many dispersed xenoliths and/or xenocrysts derived from the country rocks ...
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(2001)The Fe-Ni metal within chondrites has been postulated to have originated either through condensation or as a byproduct of chondrule formation. To test these hypotheses, we studied metal in three Renazzo-like carbonaceous ...
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(2003)Osmium-rich Pt group element (PGE) alloys occur worldwide in association with chromite in ultramafic (peridotite) complexes. It has been suggested that these Os-rich alloys formed under extreme P-T conditions in the lowermost ...
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(1996)A simple model that accounts for the formation of the Mn maximum in the oxygen minimum is presented here. In this model, Mn is proposed to cycle in a constant proportion to carbon, as do nitrogen and phosphorous. Superimposed ...
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(2004)The galactic version of geochronological scale, which is based on hypothesis that its basic reference points correspond to moments of geological time, when our Solar System traversed the spiral arms of Galaxy, is analyzed. ...
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(2002)The Malyshevsk (Mariinsk) beryllium-emerald deposit is the most important object in the Izumrudnye Kopi ore field (the eastern slope of the Middle Urals). Its genetic type and formation conditions are specified after ...
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(1989)Mathematical modelling of thermal thickening of the lithosphere with time indicates that the thickness of the lithosphere beneath the Siberian platform in the late Permian and Triassic, when intensive trapp magmatism ...
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(2001)According to experimental data on granitic and nepheline syenitic systems, Ta, Nh, Zr, and Hf in equilibrium aluminosilicate acid aluminofluoride melts are preferably concentrated in the Former. Crystallization differentiation ...
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(1990)An ore show of phosphate raw material has been found for the first time on the east slope of the Urals, in the basin of the Man'ya River in the Circumpolar Urals. The residual-infiltrational or chemogenic-mechanogenic ...
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(2001)The convective flow pattern beneath the oceanic lithosphere is strongly influenced by the movement of the lithospheric plate on top. Assuming upper mantle convection, the wavelengths, geometric structure and time of onset ...
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(1999)The growth rate of an inhomogeneity at the source of a future earthquake is investigated as a function of time and the magnitude of the earthquake. The results are compared with field observations.
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(2004)Four or five anterior caudal vertebrae of archaic horned dinosaurs (Protoceratopidae) have the heterocelous centrum. The cranial and caudal articular surfaces of these centra are posteriorly concave in the ventral view and ...
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(2002)The year 2000 was marked by the anniversaries of some of the oldest paleontologists who pioneered in different fields of paleontology. Most of them were talented teachers and many participated in discoveries of deposits ...
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(2001)A method that directly solves the boundary problem of flow to a horizontal-well in an anisotropic confined aquifer is provided. This method solves the point source problem first, and then integrates the point source solution ...
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(2001)Various proofs of the Legendre Addition Theorem, as they appear in the mathematical literature, are outlined. The proof of the mentioned theorem, based on the induction method, is analyzed in detail.
Now showing items 8344-8363 of 21936