in this paper by using mm5 modeling system, the effects of the alborz mountain range on the development of synoptic weather systems on the leeward side of the mountains have been studied. the primary aim was to see if the cyclones are produced and intensified (cyclogenesis), however the cyclogenesis was found not to be marked and hence the focus of the study was on the effects of the mountain o...

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...

The United Arab Emirates is a peninsular country located on the south-west side of the Arabian (Persian) Gulf and on the north-west banks of the Gulf of Oman (Figure 1). With an area of 83 600 square kilometres (Al Abed et al. 1996: 269), the United Arab Emirates consists of seven emirates: Abu Dhabi, Dubai, Sharjah, Ajman, Umm al-Qawain, Ras alKhaimah and Fujairah. It was known prior to confed...

allochthonous masses are common structures in zagros fold-thrust belt. they are generally considered as collapse structures formed by the influence of gravity and in rock units with competency contrast. however, large allochthonous masses mapped in dowgonbadan area in dezful embayment near the mountain front fault (mff) of zagros show characteristics different from the belt common collapse stru...

Natural hybridisation and subsequent introgression mediate the transmission of mitochondrial DNA (mtDNA) from native mountain hares (Lepus timidus) to introduced brown hares (L. europaeus). We investigated mtDNA Restriction Fragment Length Polymorphism among 62 Scandinavian mountain hares, 20 brown hares with mountain hare mtDNA and 19 presumed hybrids from 57 localities in Sweden and Norway. A...

Theoretical studies support the idea that internal dynamics of actively deforming mountain ranges are influenced by spatial and temporal variations in climate. The identification plausible correlations between orogen behavior external climatic processes requires, among other factors, initiation duration any deformation event be precisely constrained. Here, we add new detrital zircon U-Pb ages 1...