نتایج جستجو برای: zagros mountains morphology
تعداد نتایج: 162390 فیلتر نتایج به سال:
The study area is located in the Soredal mountains, southern Mashkan village in the border of Iran with Iraq. The rock compositions are harzburgite to dunite which metamorphosed under various degrees of serpentinization. On the basis of mineral chemistry studies, main compositions of olivine and orthopyroxene are Fo (85.07- 91.55) and En (0.89- 0.92) respectively. Composition of clinopyroxene i...
As the most widely distributed snake in Eurasia, the adder (Vipera berus) has been extensively investigated in Europe but poorly understood in Asia. The Southern Altay Mountains represent the adder's southern distribution limit in Central Asia, whereas its population status has never been assessed. We conducted, for the first time, field surveys for the adder at two areas of Southern Altay Moun...
The chamomile species of Anthemis triumfettii (L.) All is one of important medicinal plant belong to Compositae family and it grows as wild species in Zagros and Alborz Mountains, Iran. The aim of this study was to evaluation of morphological and phenological traits and their relationships with essential oil. Seeds of seven accessions were sown in jiffy pots and transferred to field using rando...
Zagros Mountains in west of Iran are covered by unique forests and rangelands. Increasing population, low level of development and high dependence of local people on natural resources for primary livelihood needs resulted in degradation of Zagros forests and rangelands. Along with these factors, since the last decade, climate change including severe drought is an important issue in the world, p...
Tectonic stresses governed by the Arabia – Central Iran collision are transferred throughout Iranian Plateau. The orientation of maximum horizontal stress (σ 1 ) significantly changes (~90°) in Persian block NW Iran. However, exact spatial extent and boundary conditions for these poorly defined. This study investigates late Cenozoic regime a key region including Mahneshan Mianeh Basin (MMCB), G...
The Gurpi Formation constitutes the source rock for petroleum in the oil-rich South Iranian Basin.Gurpi Formations is well distributed along Zagros Foreland Basin particularly in the north west of the Zagros (Lorestan Province). For Microbiostratigraphy and Paleobathymetric studies of the Gurpi Formation in the central part of Lorestan two stratigraphic sections including Sultan and Amiran sect...
quantitative assessment of relative tectonic activity in the alamarvdasht river basin, south of iran
tectonic processes are major factors controlling landform development in tectonically active areas. in order to evaluate quantitative measurement of tectonic activities in the alamarvdasht basin in the south of iran, six different morphological indices including stream-gradient index (sl), drainage basin asymmetry (af), hypsometric integral (hi), valley floor width-valley height ratio (vf), dra...
Undoubtedly, the flood is known as a natural disaster. But in practice, considered most terrible disaster terms of mortality and financial losses. In this regard, worrying trend increasing damage world recent decades. The increase population assets floodplain changes hydro systems destructive effects human activities have been major cause trend. chapter, due to importance phenomenon ZayandehRud...
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