Fig.2 - Landscape evolution model on Continental Africa at 10Ma.

Intervenant

Raphaël Tournier

Doctorant, ISTerre, université de Grenoble

Reconstruction de la paléogéographie africaine entre 30 Ma et 1 Ma : définition des conditions limites pour les modèles éco-évolutionnaires

Large eco-evolutionary studies require realistic and dynamic environmental frameworks, used both as a spatial background and as stress variables (e.g., geographic barriers, water availability, resource distribution, and environmental stability). In this context, we reconstruct the environmental evolution of continental Africa over the past 30 million years using a multi-layered modelling approach.

The resulting paleogeography integrates several geodynamic components, including mantle-driven dynamic topography, crustal tectonics history, plate tectonic motions, and volcanic eruptive dynamics. Combining these elements allows us to produce an elevation model for Africa since 30 Ma, continuous in space and time. This elevation model is then also used as a boundary condition for climatic and physiographic simulations, generating a more comprehensive representation of past environments. I then evaluate the spatial and temporal accuracy of these reconstructions by confronting them with field-based evidence. This assessment identifies the scales at which the models are most robust, informing which interrogation can be explored with confidence. It also highlights where the reconstructions correspond with geological, paleoenvironmental, and paleontological data, and where their precision may require refinement.

Lieu

  • Salle 410, bât. B35 (3ème étage, aile nord), université de Poitiers.

Août 2026

Publication American Journal of Biological Anthropology

Août 2026

Publication Journal of Human Evolution

18 juillet 2026

Article de presse Midi Libre sur la conférence à Villeveyrac

Juillet 2026

Offre de thèse Palevoprim & Université de Wits

Retour en haut