نتایج جستجو برای: fluvial sedimentation
تعداد نتایج: 22091 فیلتر نتایج به سال:
The main objective of the paper is paleo digital elevation model (paleoDEM) detection and modelling, a multidisciplinary approach involving geodesy, archaeology, and paleoenvironmental studies. The digital elevation model (DEM) is an important data layer to understand settlement pattern and socioenvironmental contexts and evolution that archaeologists are using together with GIS analysis. It ca...
High-quality undisturbed samples of fluvial sand were obtained from the field using ground freezing technique. In laboratory, in situ void ratio these high-quality frozen was replicated four different reconstitution methods: dry deposition, moist tamping, water sedimentation (by spooning) and slurry deposition. The initial fabric specimens evaluated X-ray micro-computed tomography advanced imag...
The thick sequence of Quaternary sediments preserved within the northern North Sea contains important information about glacial history, palaeo-oceanographic conditions and slope stability this region during last 2.6 million years. interplay between glacial, fluvial contouritic processes can be determined from seismic stratigraphic studies. Here, horizon, attribute geomorphological interpretati...
The stratigraphic and compositional study of three sediment cores recovered close to the Po River near Ostiglia provides clues on changes in fluvial dynamics at transition from last glacial present interglacial. Upper Pleistocene units are dominated by sands with high content volcanic lithics, denoting supply south-Alpine fluvio-glacial tributary system. Early–Mid Holocene unit, peat-rich barre...
Floodplain sedimentation removes particles from fluvial transport and constructs stratigraphic records of flooding, biogeochemical sequestration and other aspects of the environmental history of river basins-insight that is enhanced by accurate geochronology. The natural fallout radionuclide (210)Pb, often employed to date lacustrine and marine sediments, has previously been used to determine f...
At Aberdaron, north Wales, a complex sequence of homogeneous tills and fluvial sediments overlie a hard rock base. The lower diamicton association at the bottom of the sequence consists of deformed tills and lenses of stratified sediments. It is suggested that these represent deforming bed tills and subglacial fluvial units which have been deformed together by subglacial excavational deformatio...
Floodplain sedimentation removes particles from fluvial transport and constructs stratigraphic records of flooding, biogeochemical sequestration and other aspects of the environmental history of river basins—insight that is enhanced by accurate geochronology. The natural fallout radionuclide 210Pb, often employed to date lacustrine and marine sediments, has previously been used to determine flo...
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