Evidence for Megalake Chad, north-central Africa, during the late quaternary from satellite data

Leblanc, Marc J, Leduc, Christian, Stagnitti, Frank, Van Oevelen, Peter J., Jones, Chris, Mofor, Linus A., Razak, Moumtaz and Favreau, Guillaume 2006, Evidence for Megalake Chad, north-central Africa, during the late quaternary from satellite data, Palaeogeography, palaeoclimatology, palaeoecology, vol. 230, no. 3-4, pp. 230-242, doi: 10.1016/j.palaeo.2005.07.016.

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Title Evidence for Megalake Chad, north-central Africa, during the late quaternary from satellite data
Author(s) Leblanc, Marc J
Leduc, Christian
Stagnitti, Frank
Van Oevelen, Peter J.
Jones, Chris
Mofor, Linus A.
Razak, Moumtaz
Favreau, Guillaume
Journal name Palaeogeography, palaeoclimatology, palaeoecology
Volume number 230
Issue number 3-4
Start page 230
End page 242
Publisher Elsevier BV
Place of publication Amsterdam
Publication date 2006-01-30
ISSN 0031-0182
Keyword(s) Lake Chad
remote sensing
climate change
ancient shoreline
Summary The existence of a very large Lake Chad during the late Quaternary, Megalake Chad, has long been questioned. A Megalake Chad would present strong evidence for climatic fluctuations of great magnitude during the Holocene in tropical Africa. In this paper we used satellite data from Landsat and Modis sensors to collect and analyse new information on landforms in a 2 000 000 km2 region of the Lake Chad Basin. We detected 2300 km of remains marking the ancient shoreline of Megalake Chad. The satellite data also indicated many Saharan rivers and relict deltas leading to the long paleoshoreline. Large dunefield flattenings were observed and interpreted as the result of wave-cut erosion by the paleolake. Similarities were noticed between the landforms observed along the paleoshoreline of Megalake Chad and that of the former Aral Sea. This finding has significant consequences for reconstructing paleohydrology and paleoenvironments through the Lake Chad basin, and continental climate change.
Language eng
DOI 10.1016/j.palaeo.2005.07.016
Field of Research 090905 Photogrammetry and Remote Sensing
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2005 Elsevier B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30006525

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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