Different processes operate at lithospheric scale synchronously with and subsequent to the main phase of convergence in collisional orogens, leading into their late-stage collapse and extensional evolution. This session will focus on process-oriented approach to our understanding of the crust-mantle interrelationships between tectonics, magmatism and landscape evolution during continental extension. Contributions are expected to examine these processes and their interplay, especially the formation of core complexes and sedimentary basins, melt generation and evolution, tectonically induced landscape evolution, and upper crustal response to mantle dynamics in collapsing orogenic belts. Particular emphasis will be on the broader Aegean Province and the Alpine-Mediterranean region; however, case studies from the Basin and Range, Himalayas-Tibetan Plateau, and Papua New Guinea-Woodlark regions are welcome.