The project aim at understanding the crustal architecture and regional geology of west central Africa whose geology is poorly known and yet to be mapped in detail into a regional Gondwana context and to integrate basement studies with paleoclimate, neotectonics, geomorphology and landscape evolution. The framework of geodynamic processes has being establish in previous studies but, the deformation mechanism of the major tectonic units and tectonic boundaries and the interpretation of the orogenic evolution of the Neoproterozoic belt north of the Congo craton are still controversial. Reactivation of early formed shear zones may have controlled the pattern of Mesozoic continental rifting and breakup and associated basin formation and thus be of interest to geologists on both sides of the Atlantic, and more importantly lead to better integration of the onshore and offshore geology. When deep Precambrian structures do reactivate, the manner of the reactivation and its precise influence on later structural development is poorly defined. Moreover, fundamental knowledge on paleoclimate, neotectonics and their importance for the making of present-day landscape is scarce. The project therefore involves an interdisciplinary approach including tectonics, petrology, geophysics, paleoclimatology, geomorphology and physical geography in the sub-region embracing Cameroon, Chad, Central Africa Republic, Sudan, Nigeria and Brazil.