干旱区生态环境知识资源中心(Arid): Slope retreat rates estimated from chronology of tufa deposits sheltered by inland notches on Mt. Carmel, Israel

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DOI	10.1016/j.geomorph.2020.107319
	Slope retreat rates estimated from chronology of tufa deposits sheltered by inland notches on Mt. Carmel, Israel
	Shtober-Zisu, Nurit; Vaks, Anton; Korngreen, Dorit; Frumkin, Amos
通讯作者	Shtober-Zisu, N
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2020
卷号	367
英文摘要	Inland notches are elongated half tube indentations that develop on the carbonate rocky cliffs of mountainous zones. Occasionally tufa accumulates within notches as stalactites, drapes and crusts, covering the cavity backwall or floors. In attempt to determine the age of the latest stage of notch formation and calculate the relative rate of slope retreat, U-Th dating was used on 16 tufa samples from 2 notches, providing 28 ages. Tufa growduring the time interval between the backwall erosion and visor collapse, and therefore tufa age is an approximation of the timing of the formation of the surface it developed on, i.e. the age of the notch. The oldest known tufa sample is 39.0 +/- 10.4 ky (2 sigma), and the ages of other tufa samples range from 2.1 to 23.3 ky. At the Nahal Oren notch, the present-day backwall formed by the end of the last glacial period (14 to 18 ky), whereas the visor in its present form is from the early Holocene (7 to 10 ky). The oldest sample was found similar to 1 m from the backwall, suggesting that backwall retreat rate ranges from 20 to 35 mm/ky. Other samples were deposited 50 to 200 cm from the visor edge, suggesting that slope retreat order of magnitude ranges from 10(1) to 10(2) mm/ky. The backwall of the Nesher notch formed between 10 and 14 ky. Our results correspond with the rates of tens of meters per million years, similar to the magnitude of denudation found by previous studies in the Mediterranean zone of Israel. Dating tufa deposits is a good proxy to estimate the rate of erosion in carbonate slope retreat; however, a precautionary approach should be taken, as rock particles from the eroded bedrock might embed within the tufa, affecting the age results. Questionable samples can be identified using Cathodoluminescence (CL) microscopy. (c) 2020 Elsevier B.V. All rights reserved.
英文关键词	Inland notches U-Th dating Tufa dating Denudation Slope retreat Weathering Mediterranean zone
类型	Article
语种	英语
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000564545700005
WOS关键词	EASTERN MEDITERRANEAN REGION ; DENUDATION RATES ; SPELEOTHEMS ; CAVE ; SEA ; PRECIPITATION ; DISSOLUTION ; LANDFORMS ; CLIMATE ; DESERT
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/2XILL650/325920
作者单位	[Shtober-Zisu, Nurit] Univ Haifa, Abba Khoushy Ave 199, IL-3498838 Haifa, Israel; [Vaks, Anton; Korngreen, Dorit] Geol Survey Israel, Yeshayahu Leibowitz 32, Jerusalem, Israel; [Frumkin, Amos] Hebrew Univ Jerusalem, Fredy & Nadine Herrmann Inst Earth Sci, Edmond J Safra Campus Givat Ram, IL-9190401 Jerusalem, Israel
推荐引用方式 GB/T 7714	Shtober-Zisu, Nurit,Vaks, Anton,Korngreen, Dorit,et al. Slope retreat rates estimated from chronology of tufa deposits sheltered by inland notches on Mt. Carmel, Israel[J]. Hebrew University of Jerusalem,2020,367.
APA	Shtober-Zisu, Nurit,Vaks, Anton,Korngreen, Dorit,&Frumkin, Amos.(2020).Slope retreat rates estimated from chronology of tufa deposits sheltered by inland notches on Mt. Carmel, Israel.GEOMORPHOLOGY,367.
MLA	Shtober-Zisu, Nurit,et al."Slope retreat rates estimated from chronology of tufa deposits sheltered by inland notches on Mt. Carmel, Israel".GEOMORPHOLOGY 367(2020).