نتایج جستجو برای: river terraces
تعداد نتایج: 84887 فیلتر نتایج به سال:
The cosmogenic meteoric 10Be that is produced in the atmosphere and mainly scavenged by rainfall a valuable tool for determining dates rates of Earth surface processes. A key prerequisite its applications knowledge long-term depositional flux to Earth's surface. Previous efforts on obtaining fluxes include general atmospheric circulation modelling (GCM), empirical fitting records, inventory soi...
A methodological approach to refining the identification and mapping of fluvial terraces has been applied, combining geomorphological field surveys with computation assessment different morphometric parameters (local, statistical, object-oriented), derived from a high-resolution digital terrain model (DTM) obtained LiDAR survey. The mid-sector floodplain Misa River basins was taken as valid exa...
During the penultimate glaciation vast areas of the Alps were glaciated, with piedmont glaciers protruding into the foreland. In the easternmost part of the northward draining valleys of the Alps, the glaciers did not reach the foreland, but formed valley glaciers confined by the mountainous terrain. This also applies to the Ybbs valley, where samples for luminescence dating out of glaciofluvia...
MBE growth on high symmetry surfaces depends to some extent on the shape of the terraces which form the embryos of each new atomic layer. The conditions for formation of compact or fractal terraces are discussed in two limits: large terraces, to which a continuous description applies, and small terraces, which require that the discrete nature of matter be taken into account. In both cases it is...
Central Asia is one of the most significant loess regions on Earth, with an important role in understanding Quaternary climate and environmental change. However, in contrast to the widely investigated loess deposits in the Chinese Loess Plateau, the Central Asian loess-paleosol sequences are still insufficiently known and poorly understood. Through field investigation and review of the previous...
Adsorption, storage and release of nutrient elements are related to clay minerals in agriculture and environmental activities. In this study, mineralogy of soils in a chronosequence of Sefidrud river terraces in Gilan province was investigated. After removing organic matters, carbonates and iron and aluminum oxides, fractionation of soil particles was performed by centrifuge. Soil minerals were...
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