This Volume brings together twelve contributions to a symposium held in hon our of GEORG MANDL at the University of Graz, Austria on December 1-2, 1995, in the year of his 70th anniversary. It is a tribute to a formidable scientist colleague and friend and a gift of gratitude to an inspiring leader and great in stigator. A man, who began as a theoretical physicist, made fundamental contri butions to the theory of transport processes in porous media and the mechanics of granular materials, but in his forties turned to structural geology and the me chanics of tectonic faulting - a subject that...