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Doba Basin, Chad, is situated within the Central African rift system and contains up to 13 km (8 mi) of Cretaceous alluvial and lacustrine deposits. The complex climatic and tectonic evolution of the region, spanning the early to late Cretaceous is uniquely recorded in the stratigraphic architecture. In this chapter, we present a model of alluvial and lacustrine fill, which invokes high-frequency climatic fluctuations superimposed on longer term climatic cycles and variable accommodation produced by extensional tectonic processes.

Upper Cretaceous (Cenomanian-Coniacian) Doba Basin stratal successions are interpreted to represent alluvial depositional systems that systematically varied along their longitudinal depositional...

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