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Browsing ELibrary by Title
Now showing items 9942-9961 of 21768
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REFINING GONDWANA AND PANGEA PALAEOGEOGRAPHY: ESTIMATES OF PHANEROZOIC NON-DIPOLE (OCTUPOLE) FIELDS (2002)Reliable Phanerozoic paleopoles have been selected from the stable parts of the Gondwana continents and, upon appropriate reconstruction, have been combined in an apparent polar wander (APW) path, which can be compared ...
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(1998)The eustatic component of relative sea-level change provides a measure of the amount of ice transferred between the continents and oceans during glacial cycles. This has been quantified for the period since the Last Glacial ...
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(2005)We report isotope analyses of helium, neon, argon, and xenon using different extraction techniques such as stepwise dynamic and static crushing, and high-resolution stepwise heating of three mantle xenoliths from Réunion ...
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(2001)Ilvaite, a black mixed-valence iron silicate, undergoes oxidation-dehydrogenation reaction when heated in air. Variations in the optical properties were investigated as function of the structural adjustments accompanying ...
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(1997)We present a technique for the determination of approximate reflection and transmission coefficients of surface-wave modes for a vertical plane discontinuity that is simple to use. It is applied to different models of ...
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(2002)A method is presented to turn into reality the idea of the reflection and transmission operators in the space-frequency domain for infinitely spread irregular interface in terms of the indirect boundary element method ...
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(2000)This study is concerned with the analytical solution of a problem, pertaining to marine seismic prospecting, in low-frequency wavelets propagating in a compressible liquid (an upper half-space) and incident on a porous ...
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(2004)High amplitude, high frequency, and laterally coherent seismic phases from the core-mantle boundary (CMB) are observed on data from Peaceful Nuclear Explosions in Siberia. These arrivals are observed at 2600-4000 km offset ...
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(1997)We present new seismic images of Cretaceous crust formed at a fast-spreading center in the Pacific. The high crustal reflectivity observed in these data contradicts the conventional wisdom that accretionary structures ...
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(1996)Several angular unconformities have been recognized in Cenozoic sections of the Kamchatka region located in the Pacific-Asia transition zone. They are of a regional scale and confined to certain levels: the Cretaceous-Paleogene ...
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REGIONAL COMPENSATION OF THE GREATER CAUCASUS MOUNTAINS BASED ON AN ANALYSIS OF BOUGUER GRAVITY DATA (1990)Teleseismic and geological observations of the continent-continent collision zone in the Greater Caucasus mountains of the southwestern Soviet Union indicate that the range is presently being underthrust primarily from the ...
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(2001)The following tasks are considered: (a) obtaining the regional dependencies for climatic norms of air temperature, precipitation and humidity as functions of altitude, latitude and longitude; (b) preparing a regional ...
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(2001)Parameter estimation in a regional flood frequency setting, based on a Weibull model, is revisited. A two parameter Weibull distribution at each site, with common shape parameter over sites that is rationalized by a flood ...
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(2001)Regional flood frequency analysis based on an index flood assumption and a two-parameter Weibull distribution was studied and simulation experiments were performed to compare the sample properties of quantile estimates ...
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(2004)Isostatic gravity anomalies were inverted under the assumption that compensation of topographic loads is only partly provided by Moho depth variations but is to a large extent due to the geometry of the lithosphere/asthenosphere ...
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(2002)An approach is presented to calibrate and use regional P-S amplitude ratios to improve seismic-event characterization capabilities with regard to monitoring the Comprehensive Nuclear-Test-Ban Treaty. Data for presumed ...
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(2001)We have developed a regional sequence stratigraphic framework for the productive Neocomian complex of central West Siberia. Sixteen depositional sequences have been identified on the basis of analysis of regional seismic ...
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(2001)This study establishes a method for evaluating the coefficients of tank model. First, the model coefficients were optimized using the Standardized Powell Method at 12 watersheds. Then 16 characteristics were derived from ...
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(1988)The periodicity of geologic processes is one of the main, still unsolved problems of geology. The study of geodynamic and metamorphism now allows this problem to be posed on a new level. The key to such an approach could ...
Now showing items 9942-9961 of 21768