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Browsing ELibrary by Title
Now showing items 8810-8829 of 21934
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(2003)Although the idea of the existence of a supercontinent that united the main ancient cratons in the Paleoproterozoic (1.9-1.7 Ga ago) has been debated over two decades, its configuration and position remain controversial. ...
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(1996)In order to use paleointensity data for paleosecular variation studies, we first obtain analytical for the intensity of the geomagnetic field and the corresponding dipole moment in terms of Gauss coefficients. Next, ...
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(1999)Detailed paleoseismological investigations were carried out by cutting seismodislocation zones with trenches (nine at three sites) to estimate the number of paleoearthquakes and their absolute age. The detailed structure, ...
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(2001)We conducted a preliminary study of paleoshoreline features associated with Böön Tsagaan Nuur, Tsagaan Nuur, and Orog Nuur, lakes located in the Gobi–Altai transition zone of the Valley of Lakes (Dolina Ozor) which stretches ...
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(2003)In the WNW-ESE Donbas fold belt (DF), inversion of 3500 microtectonic data collected at 135 sites, in Proterozoic, Devonian, Carboniferous, and Cretaceous competent rocks allowed reconstruction of 123 local stress states. ...
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(2000)Within the hinterland of Urals, there occur a variety of high-grade complexes that have been interpreted to be fragments of continents that were accreted to Baltica during Paleozoic orogeny. Some workers have inferred the ...
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(1997)The Upper Ordovician-Lower Carboniferous brachiopod assemblages are described and the basic framework of the Paleozoic stratigraphy in the West Siberian Lowland is substantiated by the stratigraphic distribution of these ...
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(2003)In order to date the cessation of magmatic activity and characterize the final stage of Paleozoic magmatism in the northeast Baltic Shield, we carried out isotope-geochemical investigation of dikes that are abundant within ...
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(2002)The well-known Variscan basement areas of Europe contain relic terranes with a pre-Variscan evolution testifying to their peri-Gondwanan origin (e.g., relics of Neoproterozoic volcanic arcs, and subsequent stages of ...
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(2002)Biogeographically distinctive Paleozoic fossil biotas from the Farewell terrane (which includes three previously defined subterranes, Nixon Fork, Dillinger, and Mystic) of southwestern Alaska document close ties to Siberia ...
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(2003)Three new Middle–Late Ordovician and two new Early Carboniferous paleomagnetic poles have been obtained from the North Tien Shan Zone (NTZ) of the Ural–Mongol belt in Kyrgyzstan and Kazakhstan. Paleolatitudes for the ...
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(2004)The study of Paleozoic rocks in the easternmost exposed section and eastern foothills of the Polar Urals (Shchuch'ya synclinorium) in the Shchuch'ya River basin is of great importance for the description of the rock complexes ...
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(2003)A major macroevolutionary trend in gastropod larval shell morphology occurred throughout the middle and late Paleozoic. The majority of Ordovician and Silurian gastropods have openly coiled initial whorls; this morphology ...
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(1990)Data obtained in regional geophysical studies by the Yeniseygeofizika Corporation on the southeastern margin of the West Siberian Block have led to a new interpretation of the geological structure and developmental history ...
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(1999)Using the Berezovo area of the Don-Medveditsa dislocations, the Paleozoic history of the region is reconstructed using a new method of computer data processing, which allows one to plot paleostructural maps. It was found ...
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(2000)The pre-Mesozoic section exposed by reference Vezdekhodnaya BH-4 to a depth of 5005 m is made up of Cambrian (?) granodiorites at its base followed upward by the volcanoterrigeous sequence of the Lisitsa measures and a ...
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(1996)Two intrinsically different processes, break-up of supercontinents after mantle insulation (‘hot-spots’) and early formation of supercontinents after mantle cooling (‘cold-spots’), show causal links with periods of low ...
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(2003)Existing methods for the palinspastic reconstruction of structure maps do not adequately account for heterogeneous rock strain and hence cannot accurately treat features such as fault terminations and non-cylindrical folds. ...
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(1985)In terms of plate tectonic concepts, horizontal movement are responsible for the formation of fold belts, and modern structures are interpreted by the position of the belt relative to the zones of plate collision. Paleomagnetic ...
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(2004)Drill cores from the newly discovered Baronskoe-Kluevsky Pd–Au deposit (Volkovsky massif, Central Urals) have been investigated by reflected-light and electron microscopy, and the ore minerals were analyzed by electron ...
Now showing items 8810-8829 of 21934