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Jeffrey Allman Gritzner
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BIOGRAPHY

Professor of Geography; Director, Montana Public Policy Research Institute, University of Montana, Missoula. Author of The West African Sahel: Human Agency and Environmental Change and others.

Primary Contributions (2)
Map of West and Central Africa showing the drainage networks of the Niger and Senegal river basins and the Lake Chad basin. Major rivers, tributaries, dams, swamps, sand areas, cities, and national boundaries are marked, along with elevation shading. The map includes a small locator inset highlighting the region within the African continent.
Lake Chad
Lake Chad, freshwater lake located in the Sahelian zone of west-central Africa at the conjunction of Chad, Cameroon, Nigeria, and Niger. It is situated in an interior basin formerly occupied by a much larger ancient sea that is sometimes called Mega-Chad. Historically, Lake Chad has ranked among…
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