نتایج جستجو برای: alluvial fan

تعداد نتایج: 15294  

2001
Chris Paola Kelin X. Whipple David Mohrig

Alluvial fans and fan-deltas are of three basic types: those built up primarily by the action of constantly avulsing river and stream channels, those constructed by sheet flows, and those resulting from. ~e successive deposition of debris flows. The present analysis is directed toward the first two types. A mechamstic formulation of flow and sediment transport through river channels is combined...

ژورنال: کواترنری ایران 2020
Fattahi, Morteza, Amini, Hamideh , Hafizi, Saba ,

Introduction   The left lateral Doruneh Fault System (DFS), is one of the longest, and most prominent, strike-slip faults in Iran, extending from the eastern border of Iran to the central Dasht-e-Kavir with a curved geometry. DFS is the response of the convergence between the Arabian and Eurasian plates in the regional tectonic map. Regarding to scaling relationships this fault with length of ...

Journal: :مطالعات باستان شناسی 0
مهران مقصودی دانشیار گروه جغرافیای طبیعی، دانشگاه تهران سید محمد زمان زاده استادیار گروه جغرافیای طبیعی، دانشگاه تهران حسن فاضلی نشلی دانشیار گروه باستان شناسی، دانشگاه تهران روح الله یوسفی زُشک استادیار گروه باستان شناسی، دانشگاه آزاد ورامین سمیرا چزغه دانشجوی دکتری ژئومورفولوژی، دانشگاه شهید بهشتی حجت الله احمدپور دانش آموخته کارشناسی ارشد باستان شناسی، دانشگاه آزاد اسلامی واحد تهران مرکز

water resources throughout human history have always been an important factor in attracting human settlement. the main purpose of this paper was to investigate what is the role of shadchay river in the location of two prehistoric settlements that are called tepe meymon abad. in this research by field studies and also to investigate the characteristics of the sediments, samples were taken from t...

Journal: :جغرافیا و مخاطرات محیطی 0
عقیل مددی داود مختاری حمدیه شیرزادی ارسلان مهرورز

1. introduction the earth's crust is composed of various landforms. these forms are constantly changing. in this change, both of internal and external factors have a decisive role. the internal factors led to the formation of the primary structure and external factors that cause erosion, deformation and destruction of these forms. areas that have been affected by these activities confronted by ...

Aims & Backgrounds: The Quaternary period is considered as the interval of climatic oscillations (glacial and interglacial) coupled with tectonic episodes. Therefore, tectonics and climate have simultaneously governed the evolution of Quaternary alluvial fans. Unraveling the tectonic and climatic factors under varied depositional systems is therefore the fundamental issue in understanding the e...

Journal: :Bulletin of the mineral research and exploration 2021

Yalvaç and Ilgın basins surrounding the Sultandağları opened due to orogenic collapse in early Miocene. The NW-SE trending Çakırçal Akşehir Faults, forming boundaries with these basins, caused both opening of uplifting Sultandağları. During Miocene-Pliocene period, alluvial fans fed from developed on basin margins, while lacustrine carbonate clastic depositions occurred basin's interior. Alluvi...

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