干旱区生态环境知识资源中心(Arid): Magnetostratigraphy and Paleoenvironments of the Kuntila Lake Sediments, Southern Israel: Implications for Late Cenozoic Climate Variability at the Northern Fringe of the Saharo-Arabian Desert Belt

Arid

DOI	10.3389/feart.2020.00173
	Magnetostratigraphy and Paleoenvironments of the Kuntila Lake Sediments, Southern Israel: Implications for Late Cenozoic Climate Variability at the Northern Fringe of the Saharo-Arabian Desert Belt
	Cruz Larrasoana, Juan 1; Waldmann, Nicolas 2; Mischke, Steffen 3; Avni, Yoav 4; Ginat, Henan 5
通讯作者	Cruz Larrasoana, Juan
来源期刊	FRONTIERS IN EARTH SCIENCE
EISSN	2296-6463
出版年	2020
卷号	8
英文摘要	The Negev Desert in southern Israel hosts a number of late Cenozoic lacustrine and palustrine sedimentary sequences that attest for past wetter conditions in what today constitutes one of the driest deserts on Earth. These sequences are of special importance because the Negev Desert forms part of the Levantine Corridor, which was probably the only continental bridge that enabled initial out-of-Africa expansion of our genusHomo. Yet, the paleoclimatic significance of these sequences still remains unknown, mainly due to their uncertain (late Pliocene to early Pleistocene) age. Here we present a combined sedimentologic, paleontologic and magnetostratigraphic study of one of these sedimentary sequences, the so-called Kuntila Lake sediments, which was carried out at the 30 m-thick Kuntila Gate section in the Nahal Paran basin, southern Israel. Sedimentological evidence and ostracod faunas indicate that these sediments accumulated in a long-lasting lacustrine basin that underwent periodic lake-level variations. Magnetostratigraphic measurements enable the recognition of a normal (N1) and a reverse (R1) polarity zone in the lower and upper halves, respectively, of the Kuntila Gate section. Correlation of N1 to the Olduvai Subchron (1.778-1.945 Ma) appears as the most likely option in view of previously published(10)Be ages derived for the uppermost part of the Kuntila Member in nearby sections. The large errors associated with these ages, however, suggest that correlation of N1 to Subchron C2An.1n (2.582-3.032 Ma) is also possible. Although our results do not resolve the age of the Arava Formation, they unequivocally relate the Kuntila Lake sediments with a long period of enhanced climatic variability because the tops of both subchrons are associated with 400 kyr eccentricity maxima. The inferred wetter conditions in the Negev Desert concurred, regardless of the age correlation, with periods of lake expansion in East Africa and clusters of short-lived expansions of the savannah throughout much of the Sahara. This would have facilitated the biogeographic connection between Africa and Eurasia, greening the path for the initial out-of-Africa dispersal ofHomo. Further research on the Kuntila Lake sediments will be necessary to better determine the timing, extent and significance of such biogeographic connection.
英文关键词	magnetochronology Arava Formation Pleistocene Pliocene Homodispersal Near East
类型	Article
语种	英语
国家	Spain ; Israel ; Iceland
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000544749400001
WOS关键词	WESTERN MARGIN ; DRAINAGE-BASIN ; EBRO BASIN ; RIFT ; QUATERNARY ; EVOLUTION ; RAINFALL ; DEPOSITS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319533
作者单位	1.Unidad Zaragoza, Inst Geol & Minero Espana, Zaragoza, Spain; 2.Univ Haifa, Dept Marine Geosci, Haifa, Israel; 3.Univ Iceland, Inst Earth Sci, Reykjavik, Iceland; 4.Geol Survey Israel Jerusalem, Jerusalem, Israel; 5.Tamar Reg Council, Dead Sea & Arava Sci Ctr, Mt Masada, Israel
推荐引用方式 GB/T 7714	Cruz Larrasoana, Juan,Waldmann, Nicolas,Mischke, Steffen,et al. Magnetostratigraphy and Paleoenvironments of the Kuntila Lake Sediments, Southern Israel: Implications for Late Cenozoic Climate Variability at the Northern Fringe of the Saharo-Arabian Desert Belt[J],2020,8.
APA	Cruz Larrasoana, Juan,Waldmann, Nicolas,Mischke, Steffen,Avni, Yoav,&Ginat, Henan.(2020).Magnetostratigraphy and Paleoenvironments of the Kuntila Lake Sediments, Southern Israel: Implications for Late Cenozoic Climate Variability at the Northern Fringe of the Saharo-Arabian Desert Belt.FRONTIERS IN EARTH SCIENCE,8.
MLA	Cruz Larrasoana, Juan,et al."Magnetostratigraphy and Paleoenvironments of the Kuntila Lake Sediments, Southern Israel: Implications for Late Cenozoic Climate Variability at the Northern Fringe of the Saharo-Arabian Desert Belt".FRONTIERS IN EARTH SCIENCE 8(2020).