Across an early Holocene humid phase in western Sahara:Pollen and isotope stratigraphy

Anne-Marie Lézine; Joël Casanova; Claude Hillaire-Marcel

doi:10.1130/0091-7613(1990)018<0264:AAEHHP>2.3.CO;2

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Research Article| March 01, 1990

Across an early Holocene humid phase in western Sahara:Pollen and isotope stratigraphy

Anne-Marie Lézine;

Anne-Marie Lézine

1

Laboratoire de Géologie du Quaternaire, Centre National de la Recherche Scientifique, Case 907 13288 Marseille-Luminy cedex 9, France

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Joël Casanova;

Joël Casanova

2

GEOTOP, Université du Québec à Montréal, B.P. 8888, Montréal, Québec H3C 3P8, Canada

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Claude Hillaire-Marcel

1

Laboratoire de Géologie du Quaternaire, Centre National de la Recherche Scientifique, Case 907 13288 Marseille-Luminy cedex 9, France

2

GEOTOP, Université du Québec à Montréal, B.P. 8888, Montréal, Québec H3C 3P8, Canada

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Author and Article Information

Anne-Marie Lézine

1

Laboratoire de Géologie du Quaternaire, Centre National de la Recherche Scientifique, Case 907 13288 Marseille-Luminy cedex 9, France

Joël Casanova

2

GEOTOP, Université du Québec à Montréal, B.P. 8888, Montréal, Québec H3C 3P8, Canada

Claude Hillaire-Marcel

1

Laboratoire de Géologie du Quaternaire, Centre National de la Recherche Scientifique, Case 907 13288 Marseille-Luminy cedex 9, France

2

GEOTOP, Université du Québec à Montréal, B.P. 8888, Montréal, Québec H3C 3P8, Canada

Publisher: Geological Society of America

First Online: 02 Jun 2017

Online ISSN: 1943-2682

Print ISSN: 0091-7613

Geological Society of America

Geology (1990) 18 (3): 264–267.

https://doi.org/10.1130/0091-7613(1990)018<0264:AAEHHP>2.3.CO;2

Abstract

Paleohydrology and paleoecology of the region around the Chemchane sabkha (Mauritania) are reconstructed from the comparative analyses of mineralogy, stable isotope ratios of bulk carbonates, and palynology from sediment cores. The age of the section is from ca. 13.5 ka to the middle Holocene. Maximum lake expansion between about 8.3 and 6.5 ka is recorded in a girdle of stromatolite carbonates. These document a lower-salinity lake concomitant with a general establishment of Sahel-Sudan vegetation. The Chemchane area is the northernmost (lat 21°N) occurrence of humid- phase elements that are related to maximum intensity of monsoon activity during the early Holocene.

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