.Lecture Notes in Earth Sciences Editors: S. Bhattacharji, Brooklyn H. J. Neugebauer, Bonn J. Reitner, Göttingen K. Stüwe, Graz Founding Editors: G. M. Friedman, Brooklyn and Troy A. Seilacher, Tübingen and YaleIn various periods throughout the younger earth history comparable changes in climate occurred globally and simultaneously. Such global events can be recon- structed with the help of reliefs, sediments and palaeosoils and their specific mor- phological, chemical and mineralogical properties. Desert margins represent inter- sections between arid and humid ecosystems. Their geographical position will react very sensitively on climatic changes. The broad regions of transformation between recent humid ecosystems and the fully arid deserts are the.
