His main research topics include karst, slope movements, tectonic geomorphology and geomorphological mapping, and has conducted investigations in various regions (Alaska, Rocky Mountains, Colorado Plateau, Malta, Zagros Mountains, Italy, Saudi Arabia, Spain). He has published more than 115 papers in journals included in the Journal Citation Report. Francisco is member of the Editorial Board of the journals Geomorphology and Environmental Earth Sciences, and has co-edited eleven special issues for international journals. Has co-edited the book Landscapes and Landforms of Spain (Springer) and is co-author of the book Landforms of the Earth (Springer). Recently, expert appointed by the International Court of Justice and member of the Seismic Source Characterization Team of a SSHAC Level 3 Project in Spain.