نتایج جستجو برای: piedmont plains and area
تعداد نتایج: 16876989 فیلتر نتایج به سال:
in solvo-hydrothermal method, xrd pattern was indicated presence of intermediate of ammonium octatmolybdate and ammonium tetramolybdate, which were changed to stble phase of ?-moo3 annealing. sem images were indicated nanoparticle with semispheical morphology and tem image was demonstrated nanoparticles with a diameter size of 25nm. also in impregnate method. the xrd pattern was shown high crys...
introduction: soil genesis and development in arid and semi-arid areas are strongly affected by geological formations and geomorphic surfaces. various morphological, physical, and geochemical soil properties at different geomorphic positions are usually attributed to different soil forming factors including parent material and climate. due to variations in climate, geological formations (quater...
The calcification of soils and the effects of topography on this process were studied in semi-arid regions of Kermanshah. From a toposequence, based on the previous soil surveys of the region, five profiles were selected, and field studies and laboratory analyses were carried out on soils. Alluvial - colluvial fans, piedmont alluvial plains, and old plateaux were three main physiographies on th...
In order to determine the source and critical areas of wind Erosion, Sistan Plain, IRIFR-E.A method was applied. According to geomorphological investigations, the studied area consists of the following two main units namely: Pediment with 1 type and 8 geomorphological facies, and playa with 2 types of flatland and desert type that includes 9 geomorphological facies. On the basis of sediment, th...
[1] A 1 km vertical section of etched terrain and hematite-bearing plains materials and nearby cratered terrain surfaces was mapped in the northern portion of Meridiani Planum using MOC, THEMIS, MOLA, and OMEGA data. The oldest materials are the cratered plains, which have 0.4 to 2.5 mm spectral reflectance dominated by a mix of low and high calcium pyroxenes. Etched plains materials overlie th...
ABsrnAcr.-Rafinesque's big-eared bats (Cc1)'llOrhinus mjinesquit) use bridges as day roosts in parts of their range, but information on bridge use across their range is lacking. From May to Aug. 2002 we surveyed 1129 bridges (12.5%) within all 46 counties of South Carolina to determine use and selection of bridges as day roosts by big-eared bats and to document their distribution across the sta...
AB=RA~T.-Rafinesque's bii-eared bats (Corynmhinus ra-t] use bridges as day roosts in parts of their range, but information on bridge use across their range is lacking. From May to Aug. 2002 we surveyed 1129 bridges (12.5%) within all 46 counties of South Carolina to determine use and selection of bridges as day roosts by big-eared bats and to document their distribution across the state. During...
The loess in the arid area of Xinjiang is located at eastern end Central Asia Loess Belt, and paleoclimate research about it great importance for understanding mechanism interaction Eurasian Westerly monsoon system aridity Asia. This review focuses on recent progress concerning spatial distribution, material composition provenance points out shortcomings challenges to dust circulation. Field in...
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