نتایج جستجو برای: alluvium

تعداد نتایج: 476  

Journal: :Journal of Natural Sciences Research 2021

Organic matter is related to all plant nutrients and a major contributor tropical soils cation exchange capacity. Its relationship with physical properties currently undermined. deliberate inclusion in can be used reverse soil compaction due high bulk density improved structure texture. some such as density, total porosity, particle size distribution (texture) moisture content was studied selec...

Journal: :Japanese Geotechnical Society Special Publication 2016

2016
Leonard Rogers

The enormous network of rivers comprised in the delta of the Ganges and Brahmaputra frequently furnish examples of the shifting of the beds of streams and the diversion of considerable bodies of water into different channels, with consequent decrease in the flow of others. The general tendency, however, is inevitably to gradual silting up of the smaller rivers by the quantities of alluvium brou...

2009
ELWYN L. SIMONS

A fossil monkey skull recovered from the "Old Alluvium" of presumed Pleistocene age near Wad Medani in the Central Sudan is described. This find represents a variant of Colobus polykomos abyssinicus, a living species whose habitat is restricted to forest canopy. Since this skull is not abraded and is unlikely to have been water-transported more than a few kilometers to its site of burial, it pr...

2001
Richard G. Baker E. A. Bettis R. F. Denniston L. A. Gonzalez

Sediments along 1st–5th-order streams in Midwestern USA contain excellent records of abrupt climatic change in the Holocene. Cutbank exposures provide AsnapshotsB of areal paleovegetation based on assemblages of well-preserved pollen and plant macrofossils; when these sites are radiocarbon dated and arranged chronologically, a detailed picture of Holocene vegetational change emerges that is con...

2006
Matthew J. Rogers Eric Kirby Matthew Rogers

Slip rates of the right-lateral Owens Valley Fault lie at the center of an ongoing debate over the rheology and mechanics of lithospheric deformation in eastern California. Slip rates determined from paleoseismic records of surface rupture yield Late Pleistocene – Holocene rates of < 1mm/yr to ~2 mm/yr. The decadal velocity field across the valley, however, approaches ~6 mm/yr of right-lateral ...

Journal: :Journal of Geotechnical and Geoenvironmental Engineering 2022

This case study presents an application of a conditional transition probability method for interpreting subsurface stratigraphy the interbedded alluvium underlying Perris Dam, and evaluating effects stratigraphic uncertainty on nonlinear dynamic analysis (NDA) results design earthquake loading. The challenges involved in synthesizing information from different sources (i.e., geologic conditions...

Journal: :GeoScience Engineering 2021

A geophysical investigation that involves the integration of Vertical Electrical Sounding (VES), Resistivity Imaging (ERI), and Ground Penetrating Radar (GPR) methods was conducted on Papalanto, Ogun River floodplain, a location underlain by sedimentary terrain Southwestern Nigeria. This research aimed to image underground lithological units delineate shallow geologic structures in order charac...

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