On the formation of couplet-style stratifications
On the formation of couplet-style stratifications作者机构：Ph.D. Engineer Department of Sediment Research China Institute of Water Resources and Hydropower Research Chegongzhuangxilu 20 Beijing 100044 China Ph.D. Engineer Nanjing Hydraulic Research Institute Hujuguanlu 34 Nanjing 210024 China Ph.D. Prof. Department of Sediment Research China Institute of Water Resources and Hydropower Research Chegongzhuangxilu 20 Beijing 100044 China
出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))
年 卷 期：2008年第23卷第1期
页 面：85-91页
核心收录：
学科分类：0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 081502[工学-水力学及河流动力学] 0903[农学-农业资源与环境] 0816[工学-测绘科学与技术]
基 金：National Natural Science Foundation of China NSFC: 40706034
主 题：Couplet-style stratification Formative model Sedimentological features Landform
摘 要：Couplet-style stratifications refer to the sedimentary sequences that consist of alternating coarse-grain-dominated bed and fine-grain-dominated bed, with or without a sandwiched middle-sized bed. The formation mechanism is complicated due to the interplays of varying driving force (s), sediment supply & transport and topographic configurations. This paper presents a comprehensive overview of such characteristic bedforms, which emerge during the transport and deposition of non-uniform sediments. The leading formative models include water-stage variation, gravel-overpassing process, superimposition of bedload sheets and avalanching process (inverse grading). Each process might produce similar or distinct sedimentological features with respect to grading, matrix content, grain attitude, bounding faces between beds and internal longitudinal/transverse geometry. The couplet-style stratified strata might play an active role in landscape evolution.
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