干旱区生态环境知识资源中心(Arid): Quaternary evolution of a hyperarid drainage under climatic fluctuations and rift-margin base-level fall, NE Negev, Israel

Arid

DOI	10.1016/j.geomorph.2020.107042
	Quaternary evolution of a hyperarid drainage under climatic fluctuations and rift-margin base-level fall, NE Negev, Israel
	Neagu, Nathalie 1; Matmon, Ari 1; Enzel, Yehouda1 ; Porat, Naomi 2
通讯作者	Matmon, Ari
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2020
卷号	354
英文摘要	The long-term bedrock incision of streams in the northeastern Negev has been dictated, since the Early Pliocene, by the subsidence of the Dead Sea basin. However, this incision is accompanied by very long intervals of sediment aggradation. Here, we document the Quaternary-scale fluvial response to changing base-level, lithology, structure, and climate along the hyperarid Nahal Zafit, NE Negev. The oldest (similar to 1-2 Ma) alluvial remnants point to a widespread beveled bedrock pediment at the base of the Hazera anticline. This pediment, like other stream-pediment-anticline relationships in the region, provides the baseline framework into which Nahal Zafit incises. During the Early to Middle Pleistocene, this pediment was the base-level for all streams emerging out of the anticlines. The tectonic subsidence of the regional base-level at the rift margin farther downstream, has caused incision and upstreammigration of bedrock knickpoints, triggering the development of a wide incised valley in the Mazar syncline, adjacent to the Hazera anticline. Since similar to 330 ka, fluvial terraces, landslides and taluses record intervals of basin-wide fluvial deposition under prevailing hyperarid to arid climate. Despite the general arid climate, prolonged fluvial deposition intervals occurred at ca. 330-265, 230-125, and 110-20 ka. Rapid and quite short-duration bedrock incision occurred in-between these, much longer, intervals of aggradation. In addition to the proposed climatic imprint on fluvial aggradation-incision cycles and the first-order base-level control of the rift margin fault, the formation of strath terraces and distribution of stored sediments within the drainage basin point to the fundamental role that lithology and structure play in the Quaternary evolution of the NE Negev watersheds. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Alluvial terraces Hyperarid drainage systems Quaternary evolution OSL and CRN dating
类型	Article
语种	英语
国家	Israel ; France
收录类别	SCI-E
WOS记录号	WOS:000527297100019
WOS关键词	STRATH-TERRACE FORMATION ; RIVER INCISION ; STIMULATED LUMINESCENCE ; LANDSCAPE EVOLUTION ; WESTERN MARGIN ; EXPOSURE AGES ; NAHAL YAEL ; DESERT ; EROSION ; SEDIMENTS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	Hebrew University of Jerusalem
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314612
作者单位	1.Hebrew Univ Jerusalem, Inst Earth Sci, IL-91904 Jerusalem, Israel; 2.Geol Survey Israel, 30 Malkhe Yisrael St, IL-95501 Jerusalem, Israel; 3.Aix Marseille Univ, CEREGE, UMR 6635 CNRS, BP 80, F-13545 Aix En Provence 4, France
推荐引用方式 GB/T 7714	Neagu, Nathalie,Matmon, Ari,Enzel, Yehouda,et al. Quaternary evolution of a hyperarid drainage under climatic fluctuations and rift-margin base-level fall, NE Negev, Israel[J]. Hebrew University of Jerusalem,2020,354.
APA	Neagu, Nathalie,Matmon, Ari,Enzel, Yehouda,&Porat, Naomi.(2020).Quaternary evolution of a hyperarid drainage under climatic fluctuations and rift-margin base-level fall, NE Negev, Israel.GEOMORPHOLOGY,354.
MLA	Neagu, Nathalie,et al."Quaternary evolution of a hyperarid drainage under climatic fluctuations and rift-margin base-level fall, NE Negev, Israel".GEOMORPHOLOGY 354(2020).