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Now showing items 5724-5743 of 39124
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(2004)A new form genus, Pseudotsugoxylon, is designated to include fossil woods with anatomical characters typical of extant Pseudotsuga. The material came from the Pliocene of the Pavlovka lignite field (southern Primorskii ...
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(2003)Two new species, Laricioxylon priamnrensis and Populoxylon priaimtrensis, are described from the upper Miocene of the Erkovetskii brown coal field (Amur River Region) on the basis of wood anatomy. The former combines ...
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(1989)Cyclic layering is a common feature of the ultramafic zone of layered intrusions and is usually attributed to the entry of new pulses of dense magma into the chamber. Since the crystallization of olivine and bronzite lowers ...
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(2003)In the southeast of Western Siberia within the zone of birch and pine forests in the Ob'-Tom' interfluve area, four new pollen diagrams from sites in different landforms (interfluve, terraces, floodplain, and ancient ...
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(2004)Fractal analysis has been performed on ultra-low-frequency (ULF) geomagnetic field data observed at the Izu peninsula. The first attempt of using fractal analysis for ULF geomagnetic field data during the large Guam and ...
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(1996)A model for an earthquake simulation is proposed with the use of a fractal approach. Multiple generation and coalescence of shear faults in stochastic brittle media (modelled as a 2d lattice) are considered to be a source ...
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(1988)Investigation of areas where ferromanganese nodules occur on the sea floor identifies a characteristic property of their structure: the nodules are not uniformly distributed, but form regular clusters and sparse areas. For ...
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(2001)In the past, a great deal of research has been conducted to determine the fractal properties which quantify the sinuosity of individual streams and the branching configuration of stream channel networks in watersheds. Much ...
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(Федеральное государственное бюджетное учреждение науки Геофизический центр Российской академии наук, 2016)It is shown in the paper that the system of equations of solid mechanics, which has a mixed type, demonstrate the most common features of evolution of nonlinear dynamic systems. Previous investigations of seismic process ...
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(1990)The objective of our research was to test how the occurrence of sulfide ores is related to the fractal dimension of faults in the axial zones of midocean ridges. The investigations were based on data collected by teams of ...
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(2003)High-velocity friction experiments on gabbro and monzodiorite, using a rotary-shear high-velocity friction apparatus, have revealed that frictional melting and progressive growth of a molten layer along a fault cause slip ...
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(1997)Mixing processes in mantle convection depend on the rheology. We have investigated the dynamical differences for both non-Newtonian and Newtonian rheologies on convective mixing for similar values of the effective Rayleigh ...
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(2001)Fractal models have been established for the distributions of Au, As, S, Fe, and Si on mineral surface based on perimeter-area power-law association observed in mineral samples from fine-disseminated gold deposits at Jinya ...
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(1990)The concept of a lateral structure of geosystems is most useful in identification of the nature of land use. The properties of lateral structures that exhibit signs of disorder can be determined in terms of fractals. Fractal ...
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(2002)Electrokinetic phenomena in a water-porous medium with a fractal structure above percolation threshold are theoretically investigated. Fracture zone with space-variable porosity is considered as a model of an earthquake ...
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(1996)The low-grade Palaeoproterozoic stratabound banded iron ores of the Krivoy Rog basin (Ukraine) underwent strong tectonometamorphic deformation into superimposed folds of several orders, with amplitudes from centimetres to ...
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(2001)The problem of seismicity physics reduces in a first approximation to the stability of a system of defects in a stress field. The characteristics of fractal properties of the lithosphere throughout its volume can be estimated ...
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(2001)Seismic wave scattering can be used to estimate the fractal structure of the lithosphere. We analyzed the digital seismograms of the aftershocks of the magnitude 6.9 Racha, Caucasus, earthquake of April 29, 1991, at ...
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(2002)A fractal (power-law) distribution is the only statistical distribution applicable to a scale-invariant process. One of the major problems in petrology is the distribution of trace elements in the Earth's crust. Extreme ...
Now showing items 5724-5743 of 39124