کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4690989 | 1636175 | 2007 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Depositional character and preservation potential of coarse-grained sediments deposited by flood events in hyper-arid braided channels in the Rift Valley, Arava, Israel
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The texture of the deposited sediment generally coarsens in sympathy with the surface bed texture of the studied channels. The thickness of event-deposited sediments increases as the magnitude of flow events increases. The stratigraphic record is characterized by: (1) sub-parallel stratification, (2) no grading, (3) clast-supported gravel infilled with sand-granule matrices and (4) rapid sedimentation rates. This character is hypothesized to mirror the elevated bedload fluxes in this hyper-arid fluvial setting. Lacking densely-vegetated banks, the proximal braidplain of this arid environment often contains no extensive fine-textured floodplain successions. The depth of fill as well as the extent of strata obliteration increase with flood magnitude, explaining the increased preservation potential of event strata with increase in flood magnitude. It also explains why most event strata, including large ones, are only partially preserved.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sedimentary Geology - Volume 195, Issues 1â2, 15 February 2007, Pages 21-37
Journal: Sedimentary Geology - Volume 195, Issues 1â2, 15 February 2007, Pages 21-37
نویسندگان
Jonathan B. Laronne, Yanai Shlomi,