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Browsing ELibrary by Title
Now showing items 3660-3679 of 21821
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(2002)High-frequency S wave seismogram envelopes are broadened with increasing travel distance due to diffraction and scattering. The basic mechanism of the broadening has been studied on the basis of the scattering theory with ...
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(2002)In addition to the stable isotope 9Be, Be is also formed as two cosmogenic isotopes of interest to earth scientists. Cosmogenic Be is formed primarily in the stratosphere from cosmic-ray spallation ...
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(2004)Accumulation of millions of worn automotive tyres poses a considerable environmental problem. As an important part of the solid waste stream in today’s society, worn tyres have traditionally been discarded in landfills or ...
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(2000)Bacteriohopanepolyols are the biological precursors of extended hopane biomarkers which are ubiquitous in the geosphere. The abundance and composition of these biohopanoids were determined for modern sediments from eight ...
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(2001)The microfossil taxa reported on in this book areprimarily foraminifera, although there are some chaptersthat include discussion of the use of arcellaceans,chrysophytes, diatoms, dinoflagellates, ostracodes andpollen in ...
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(2005)Dissimilatory metal-reducing bacteria (DMRB) are important components of the microbial community residing in redox-stratified freshwater and marine environments. DMRB occupy a central position in the biogeochemical cycles ...
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(2003)Eocene diatoms and silicoflagellates from deposits of the Kronotskii Bay are the oldest known fossils of siliceous phytoplankton from the northwestern Pacific. More than 130 species of 59 diatom genera and 24 species of 5 ...
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EOLIAN DUST AND CLIMATE: RELATIONSHIP TO SOURCES, TROPOSPHERIC CHEMISTRY, TRANSPORT AND DEPOSITION (2001)The amount of atmospheric dust suspended in the atmosphere and subsequently deposited on land and in the oceans is largely controlled by processes related to climate; however, the dust's presence in the atmosphere also can ...
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(2003)The collections of primitive therapsids from the Upper Permian of Eastern Europe are revised. Morphological examination has shown that the main principles for the establishment of the subclass Theromorphu should be revised. ...
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(2004)We establish reliable and conservative estimates for epicentre location accuracy using data that are readily available in published seismic bulletins. A large variety of seismic studies rely on catalogues of event locations, ...
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(2004)Epidote minerals—the monoclinic epidote group minerals together with the orthorhombic polymorph zoisite—are important Ca-Al-silicates in many metabasites, metapelites and metacherts that are characterized by high P / T ...
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(1998)Episodic growth of continental crust and supercontinents at 2.7, 1.9, and 1.2 Ga may be caused by superevents in the mantle as descending slabs pile up at the 660-km seismic discontinuity and then catastrophically sink ...
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(2000)The temporal overlap of 1.69 1.55 Ga westward growth of the Baltic Shield and voluminous, episodic, 1.65 1.50 Ga rapakivi magmatism in the Svecofennian domain to the east has long been recognized. New U-Pb data from southwest ...
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(2002)Periods of relatively uniform plate motion were interrupted several times throughout the Cenozoic and Mesozoic by rapid plate reorganization events [R. Hey, Geol. Soc. Am. Bull. 88 (1977) 1404-1420; P.A. Rona, E.S. Richardson, ...
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(1999)We describe a model for episodic, open-ocean triple-junction migration based on observations of actual triple-junction evolutions. Migration progresses by repeated episodes of rift propagation, microplate formation, and ...
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(2004)Terranes of passive continental margins are most widespread among the Kolyma-Chukot group of terranes, whose accretion terminated in the Barremian-Aptian time. They include kilometer-scale sandy-shaly sequences deposited ...
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(2002)The epochs of formation, geodynamic setting and sources of rare-metal magmatism in Central Asia were discussed. It was found that in the late paleozoic-early mesozoic epoch, intraplate activity persisted but the area of ...
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(2002)Massive sulfide ore formation is one of the oldest ore-forming processes on the Earth and has accompanied volcanism for the last 3.5 Ga. At least four short epochs are distinguished in the planet's history, during which ...
Now showing items 3660-3679 of 21821