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Browsing ELibrary by Title
Now showing items 180-199 of 21936
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(2002)Based on an incomplete lower jaw, a new scaloposaurian, Malasaurus germanus gen. et sp. nov., is described. This is a multidentate scaloposaurid with five lower incisors and a long mandibular symphysis of extraordinary structure.
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(2004)While carrying out prospecting work at the upper reaches of the Pechora River in 2002, V.S. Ozerov, a leading geologist at the Komigeologiya Joint-Stock Company, found a contact of ancient, presumably Riphean carbonate ...
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(2002)Electromagnetic fields are computed for a 2-D electrically anisotropic earth using a finite-element technique. The models consist of a background layered structure, containing anisotropic blocks. Each block and layer may ...
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(1998)We present a finite-element model for the prediction of the subsidence history and thermal evolution of extensional basins. The model takes into account the inhomogeneity of the lithosphere, and allows the space formed by ...
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(2000)The first data on the distribution of the stable isotopes of silicon in marine and freshwater systems are reported. Both marine and riverine δ30Si are more positive than δ30Si of igneous rocks, suggesting isotopic fractionation ...
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(1989)Thermal convection in magma chambers is believed to be almost always highly time-dependent, or 'turbulent', and predicted convective velocities are commonly orders of magnitude larger than settling velocities for typical ...
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(2003)Dehydration and melting reactions generate large volumes of fluid in the crust and upper mantle, and play an important role in subduction zone seismicity. The fluid pathway must evolve from isolated pockets in low porosity, ...
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(2003)It is an embarrassingly frequent experience that statistical practice fails to foresee historical disasters. It is all too easy to blame global trends or some sort of external intervention, but in this article we argue ...
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(2003)It has recently been found that Neoproterozoic glaciogenic sediments were deposited mainly at low paleolatitudes, in marked qualitative contrast to their Pleistocene counterparts. Several competing models vie for explanation ...
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(2002)The statistical evaluation of numerical random media models and of electromagnetic array data provides evidence of fractal conductive structures in the middle and lower crust. During the search for an electrical conduction ...
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(1996)A general Equation of State (EOS), which we previously developed for pure nonpolar systems, is extended to polar systems such as water and to mixtures in this study. This EOS contains only two parameters for each pure ...
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(2002)A unifying attribute of all forms of paraglacial response is that deglaciation results in the exposure of unstable or metastable sediment sources that are subsequently tapped by a wide variety of processes over a wide range ...
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(1998)In order to simplify the computation of phase relations in multicomponent systems, a generalized excess function based on Margules-type polynomials is presented. It includes a versatile extrapolation method to higher order ...
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(1995)The production of S-type granites has been related to the extraction of melts during water-undersaturated melting of metasediments in the lower continental crust. If this mechanism is of widespread applicability, a chemically ...
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(2006)We propose a new approach to model the geochemical evolution of continuously replenished and tapped steady-state magma chambers. We use a sinusoidal function to model cyclic magma supply. The temporal evolution of a reservoir ...
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(1999)Geochemical observations of MORB including U-series disequilibria are used to examine the processes and timescales of MORB melt generation. Incompatible elements in MORB suggest that the MORB source region consists of a ...
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(2001)Researchers from the Laboratories of Geoinformation and Petrology are engaged in developing a geoinformation system, named "Volcanic Hazard'''', for the purpose of predicting volcanic hazards over the territory of Russia. ...
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(1996)Records from geomagnetic observatories in Europe are showing indications of another impulse in the third time derivative of the east component around 1991. These impulses, otherwise known as jerks, have occurred in the ...
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(2000)The series of magnetic measurements at some European observatories give some hint of a new geomagnetic jerk around 1999. The geomagnetic impulses would present the remarkable and intriguing property to occur with a frequency ...
Now showing items 180-199 of 21936