Arid
DOI10.1080/15324982.2013.841304
Paleoenvironmental Reconstruction from Palaeolake Sediments in the Area of Ouargla (Northern Sahara of Algeria)
Youcef, Fouzia1; Hamdi-Aissa, Baelhadj1,2
通讯作者Youcef, Fouzia
来源期刊ARID LAND RESEARCH AND MANAGEMENT
ISSN1532-4982
EISSN1532-4990
出版年2014
卷号28期号:2页码:129-146
英文摘要

The hyper-arid climate of Ouargla area (Northern Sahara of Algeria) is important in the field of the paleoenvironmental reconstitution. This paper investigates the importance of palaeolake sediments as significant terrestrial archives for studying Quaternary climate changes. Through morphological and mainly micromorphological investigations of the studied sites (Sabkha of Ouargla and palaeolake of Mellala), we noted the fluctuation of climate between arid and more humid conditions during Quaternary. Some pedofeatures have recorded these environmental changes. The studied calcareous crusting has a lacustrine origin when precipitations were more important. The clay coatings around the quartz grains indicate an old origin and different geochemical conditions that led to their dissolution. Lenticular gypsum crystals were formed from groundwater saturated with Ca2+ and SO42- ions. Calcite pseudomorphs after lenticular gypsum crystals indicate changes in local climatic parameters. Gypsum crusts can be explained by formation under wet climatic conditions in a lagoonal environment. Black and gray layers indicate evolution of organic matter at a wetter period. This paper highlights an unknown palaeolake which can be useful for the comprehension of the ecological past of the Sahara. The comparison between this palaeolake and other Saharan palaeolakes has allowed us to assign it to a probable active period between 10000 and 4000 years B. P.


英文关键词Holocene micromorphology palaeolake paleoclimate paleoenvironment Sabkha Sahara soil
类型Article
语种英语
国家Algeria
收录类别SCI-E
WOS记录号WOS:000337182400001
WOS关键词SOIL MICROMORPHOLOGY ; GYPSUM CRUSTS ; HOLOCENE ; AFRICA ; DESERT ; BASIN ; ENVIRONMENTS ; PEDOGENESIS ; ARCHAEOLOGY ; SALINITY
WOS类目Environmental Sciences ; Soil Science
WOS研究方向Environmental Sciences & Ecology ; Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/180855
作者单位1.Univ KASDI Merbah Ouargla, Fac Sci Nat & Life, Lab Biogeochem Desert Areas, Ouargla 30000, Algeria;
2.Univ KASDI Merbah Ouargla, Fac Sci Nat & Life, Lab Protect Ecosyst Arid & Semiarid Areas, Ouargla 30000, Algeria
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Youcef, Fouzia,Hamdi-Aissa, Baelhadj. Paleoenvironmental Reconstruction from Palaeolake Sediments in the Area of Ouargla (Northern Sahara of Algeria)[J],2014,28(2):129-146.
APA Youcef, Fouzia,&Hamdi-Aissa, Baelhadj.(2014).Paleoenvironmental Reconstruction from Palaeolake Sediments in the Area of Ouargla (Northern Sahara of Algeria).ARID LAND RESEARCH AND MANAGEMENT,28(2),129-146.
MLA Youcef, Fouzia,et al."Paleoenvironmental Reconstruction from Palaeolake Sediments in the Area of Ouargla (Northern Sahara of Algeria)".ARID LAND RESEARCH AND MANAGEMENT 28.2(2014):129-146.
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