Continental collision is a principal mechanism for continental growth and supercontinent formation. Dramatic expressions of ongoing continental collision include collisions of India and Arabia with the southern margin of Asia during the Cenozoic. These collisions produce the Zagros and Himalayan orogenic belts, the Iran and Tibet plateaus, extensive and diffuse continental deformation, and concomitant impacts on a host of Earth systems, including changes to atmospheric circulation, climate, oceanography, and faunal turnover. Numerous geological, geochemical, and geophysical data acquired in recent years across these orogenic systems allow in-depth exploration of the processes of continental collision and associated topographical and environmental changes. This session will promote discussion and idea exchanges to advance our understanding of (1) the processes of continental collision in the Zagros-Himalaya-Tibet orogens and (2) the impacts of collision on other Earth systems by integrating findings from many disciplines, including but not limited to geochemistry, geochronology, geophysics, numerical modeling, paleomagnetism, petrology, sedimentary, and structural investigations. Possible topics may include arc-continental collision before major continental collision; origin and evolution of lithological suites across suture zones; timing of initial collision; transition from syn-collisional to post-collisional structural development; linkage of deformation processes from mantle to surface; etc.