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Browsing ELibrary by Title
Now showing items 2974-2993 of 21936
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(1990)The close correlation between the development of a dike complex and veinlet-disseminated gold-sulfide mineralization with the uplift of isolated local block structures is described with reference to an ore region in central ...
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(2003)Ophiolites played a minor role in the formulation of the ideas of the history and evolution of the ocean floor because initially they were not interpreted as oceanic in origin. Early researchers working on ophiolites were ...
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(2002)In cathodoluminescence (CL) images of synthetic low-quartz samples after He+ implantation at 4 MeV with a dose density over 1.14 × 10-4 C cm-2, bright CL halos of about 14 µm in width from the implantation surface are ...
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(2001)Two orientations of fabrics are recognised in vertical dykes: a symmetric orientation associated with magma injected into non-deforming wall-rocks and an asymmetric orientation usually associated with external non-coaxial ...
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(2003)Old and new, well and poorly known lithofacies data of Moscovian and Artinskian age in the area limited by the Arctic Sea and central Africa, the Atlantic Ocean and the Ural Mountains have been plotted on present-day maps. ...
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(2004)The significant relative mass difference (c. 16%) between the two stable isotopes of Li (approximately 6Li 7.5%, 7Li 92.5%), coupled with broad elemental dispersion in Earth and planetary materials, makes this a system of ...
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(2004)Boundary-defining events influence the evolutionary behaviour of post-extinction survivors. The Cox proportional hazards model takes into account the varying background extinction rates characteristic of boundaries and ...
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(1987)Analysis of the position of vertical magnetic poles (VMP) based on the annual mean declination and inclinations, measured at observatories over the last 150 years, has shown considerable regional deviations in measurements ...
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(1989)Satellite altimetry can be used to determine the topography of the physical sea surface with an error of about 0.3 m and a lateral resolution of 30 to 80 km. This surface deviates from the geoid surface (GS) because of the ...
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(2001)During sinking the hole, it is necessary to determine place of pneumatic punch and its spatial orientation. Underground radar is universal facility for detecting the underground tools. The radar is installed on the working ...
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(1990)Mongolia contains extensively developed Devonian marine deposits, which are characterized by latitudinal facies zoning. At the present time, R. Ye. Alekseyeva has established the following horizons in the Lower and Middle ...
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(2003)Results of the revision of the taxonomic composition of Nervostrophiinae from the Devonian of the Russian Platform based on the A.I. Ljaschenko memorial collection are presented. Three new genera and seven new species ...
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(2001)In the Devonian series of northeastern Asia all standard stage boundaries are recognised using conodont indexes, as well as guides as guides of other fossil groups. Other potential correlation means include event boundaries ...
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(2004)Devonian deep-water deposits of the Southern Urals are represented mainly by flysch and cherty units. The main sedimentary basins (marginal sea and back-arc basin) and their origin, evolution and principal depositional ...
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(2004)The Early Paleozoic regression resulted in emergence of the Angaraland. Devonian deposits accumulated in various sedimentary basins, e.g., in gulfs far incised into the Angaraland, as well as in lagoons and lakes. In ...
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(2001)The Devonian stratigraphical succession of Novaya Zemlya has been discussed. In the area all standard boundaries have been recognised or traced using lithological (sedimentological) features and palaeontological data. The ...
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(2001)In this paper the position of the Devonian stage boundaries in the southern Transcaucasus is discussed, in accordance with the new standard conodont scale recommended by the SDS (Ziegler and Sandberg 1990).
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(2001)In the Urals the Devonian is represented by shelf and continental slope facies, as well as various volcanogenic rocks. Palaeontological data, including conodonts and brachiopods, are of use in regional correlation, although ...
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(2001)The Devonian of the East European Platform is chiefly represented by shallow-marine rocks of Lochkovian through Famennian age. Palaeontological evidence from various groups, including condonts, palynomorphs, ostracodes, ...
Now showing items 2974-2993 of 21936