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Browsing ELibrary by Title
Now showing items 8513-8532 of 26297
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(2006)Sedimentological and geochemical (XRF) data together with information from diatom and benthic foraminiferal records of a 3.5 m long gravity core from Ameralik Fjord, southern West Greenland, is used for reconstructing ...
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LATE-HOLOCENE ENVIRONMENTAL HISTORY OF TWO NEW ENGLAND PONDS: NATURAL DYNAMICS VERSUS HUMAN IMPACTS (2006)Analyses of sedimentary diatoms in two New England ponds reveal limnological changes during the past 2500 years that are related to climatic change, anthropogenic activities and natural disturbance. Deforestation in the ...
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(2006)We used charcoal and fossil pollen to investigate how fire, vegetation and climate have interacted over the past 2300 years at Ferry Lake, located on a sand plain in northwestern Wisconsin. Pollen analysis shows a rapid ...
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(2004)The aim of the study is to record the occurrence of sediment deformation structures in one of the tectonically most active areas on the globe, the Tien Shan range in Central Asia and to examine the significance of the ...
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(2004)A comparison of the Black and White Seas, which differ in their tectonic, glacial and climatic history but which share a strong dependence upon limited water exchange with the world ocean, represents an opportunity for the ...
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(2006)In cold regions the thermal regime is strongly affected by freezing or melting processes, consuming or releasing large amounts of latent heat. This changes enthalpy by orders of magnitude. We present a numerical approach ...
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(2001)Very low to zero shallow dip angles are observed at several moderately young subduction zones with an active trenchward moving overriding plate. We have investigated the effects of latent heat for this situation, where ...
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(1987)The Chordi Deposit is located in the Oni district, Georgia, among Middle Jurassic volcano-sedimentary rocks on the 'andesite line' of the Gagra-Dzhava structural-metallogenic zone. It consists of a series of steeply dipping ...
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(2006)The predominantly constructive life cycles of large, long-lived, stratovolcanoes and basaltic shields are punctuated by transitory episodes during which large volumes of material are divested from the flanks. Such shedding ...
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(2000)The proposed study is based upon the joint use of pairs of seismic rays refracted and reflected from the Earth's surface (scheme RR-R). This approach makes possible studies of the upper mantle in "mute" seismic regions ...
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(1990)A method allowing detailed mapping of lateral inhomogeneities of the upper mantle in mobile regions of various types has recently been developed. The method is based on the analysis of the absorption patterns of short-period ...
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(2001)When a new sedimentary unit is deposited over a region with significant differences in the thickness of the pre-existing sedimentary cover, the thickness of the new unit may express lateral differences in sediment compaction ...
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(2002)Lateral motion of material relative to the regional thermal and kinematic frameworks is important in the interpretation of thermochronology in convergent orogens. Although cooling ages in denuded settings are commonly ...
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(2004)Differences in the viscosity of the earth's upper mantle beneath the western US (∼1018–1019 Pa s) and global average values based on glacial isostatic adjustment and other data (∼1020–1021 Pa s) are generally ascribed to ...
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(2000)This study of the lateral chemical variations of amphiboles from phenocrysts in the andesites of submarine volcanoes located on the Sea of Okhotsk slope of Iturup Island, Kuril Island Arc, did not reveal any significant ...
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(2006)Seismic waves generated by meteoroid impacts have been detected by the Apollo lunar seismic network. These waves are sensitive to the crustal structure beneath both the seismic stations and the impact sites. We use a Markov ...
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(2006)Europe is a region with the largest density of geomagnetic observatories and several authors have used these data to estimate local geomagnetic response functions for various period ranges, typically of the width of 1.5 ...
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(2002)Several catalogues of global earthquakes reported for the time period from 1900 to 2000 have been compiled to examine lateral variations of the modal (a/b) values as derived from the Gutenberg-Richter empirical law. For ...
Now showing items 8513-8532 of 26297