J
Jean-François Ghienne
Researcher at University of Strasbourg
Publications - 101
Citations - 3784
Jean-François Ghienne is an academic researcher from University of Strasbourg. The author has contributed to research in topics: Ordovician & Glacial period. The author has an hindex of 33, co-authored 90 publications receiving 3270 citations. Previous affiliations of Jean-François Ghienne include Ecole et Observatoire des Sciences de la Terre & Centre national de la recherche scientifique.
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Journal ArticleDOI
The age of the Sahara desert.
Mathieu Schuster,Mathieu Schuster,Philippe Duringer,Jean-François Ghienne,Patrick Vignaud,Hassan Taisso Mackaye,Andossa Likius,Michel Brunet +7 more
TL;DR: The discovery of 7,000,000-year-old eolian dune deposits from the northern Chad Basin is reported on, which is the oldest known evidence for desert occurrence in the Sahara.
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Late Pleistocene and Holocene dune activity and wind regimes in the western Sahara Desert of Mauritania
Nicholas Lancaster,Gary Kocurek,Ashok K. Singhvi,V. Pandey,Max Deynoux,Jean-François Ghienne,Khalidou Lo +6 more
TL;DR: In this paper, an analysis of Landsat images, geomorphic and stratigraphic studies, and optically stimulated luminescence dating of dunes in the Azefal, Agneitir, and Akchar sand seas provide evidence that three main generations of Dunes were formed during the periods 25-15 ka (centered around the Last Glacial Maximum), 10-13 ka (spanning the Younger Dryas event), and after 5 ka.
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Late Ordovician sedimentary environments, glacial cycles, and post-glacial transgression in the Taoudeni Basin, West Africa
TL;DR: The sedimentary record and worldwide palaeontological and isotopic data support the existence of short-lived, latest Ordovician (Hirnantian) ice sheets over western Gondwanaland as mentioned in this paper.
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The Late Ordovician glacio-eustatic record from a high-latitude storm-dominated shelf succession: The Bou Ingarf section (Anti-Atlas, Southern Morocco)
Alfredo Loi,Jean-François Ghienne,Marie-Pierre Dabard,Florentin Paris,Arnaud Botquelen,Nicolas Christ,Z. Elaouad-Debbaj,Alberto Gorini,Muriel Vidal,Blaise Videt,Jacques Destombes +10 more
TL;DR: In this paper, high-frequency eustatic signals in a stratigraphic succession corresponding to the Katian and the Hirnantian were investigated in the Central Anti-Atlas, southern Morocco.
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A Cenozoic-style scenario for the end-Ordovician glaciation.
Jean-François Ghienne,André Desrochers,Thijs R.A. Vandenbroucke,Aicha Achab,Esther Asselin,Marie-Pierre Dabard,Claude Farley,Alfredo Loi,Florentin Paris,Steven Wickson,Ján Veizer +10 more
TL;DR: Examination of exceptionally complete sedimentary records from two, low and high, palaeolatitude settings reveals a Cenozoic-style scenario including three main glacial cycles and higher-order phenomena, which necessitates revision of mechanisms for the end-Ordovician events.