Geophysical imaging of active convergent margins and the structural inventory of fossil forearcs and subduction channels have revealed the complicated nature of the seismogenic part of a subduction zone and adjacent forearc. Further, this region is strongly shaped be material transfer processes, e.g. accretion and subduction erosion. Only recently, the potential impact of deeper seated processes on the morphology of the marine and on-shore forearc has been addressed. In this session we would like to integrate contributions from geophysical imaging, studies of the structural and compositional inventory, simulation, geodesy, and geomorphology to stimulate further joint research and discuss future hot topics in convergent margin research.