International Journal of Earth Sciences

, Volume 90, Issue 3, pp 484–499

Climate, exposed source-rock lithologies, crustal uplift and surface erosion: a theoretical analysis calibrated with data from the Alps/North Alpine Foreland Basin system


  • F. Schlunegger
    • Institut für Geowissenschaften, Friedrich-Schiller-Universität, Burgweg 11, 07749 Jena, Germany
  • J. Melzer
    • Institut für Geowissenschaften, Friedrich-Schiller-Universität, Burgweg 11, 07749 Jena, Germany
  • G. Tucker
    • University Lecturer in Geocomputation and Fellow of Brasenose College, School of Geography and the Environment, Oxford University, Mansfield Road, Oxford OX1 3TI3, UK
Original Paper

DOI: 10.1007/s005310100174

Cite this article as:
Schlunegger, F., Melzer, J. & Tucker, G. Int J Earth Sci (2001) 90: 484. doi:10.1007/s005310100174


Paleofloristic data imply that paleoclimate changed in the Swiss Alps at the Oligocene/Miocene boundary from humid and hot conditions toward a climate with high temperature and low humidity. The aridization is associated with a change in depositional pattern from alluvial fans to lakes and floodplains, suggesting decreasing sediment discharge. A further 25–40% decrease of sediment discharge occurred at ca. 20 Ma when the orogenic core of the Alps became exposed to the surface. We applied a surface processes model to explore potential controls on the pattern of sediment discharge and on the evolution of the Alpine drainage basin. The model is based on the presumption that the rates of fluvial incision into bedrock are proportional to shear-stress exerted by the flowing water. The model results imply that the paleoclimate change resulted in an instantaneous decrease of sediment discharge and a vertical topographic growth until steady-state conditions between erosional and crustal mass flux are established. However, exposure of the crystalline core of the Alps at ca. 20 Ma is likely to have resulted in the 25–40% decrease of sediment discharge and the reorganization of the drainage pattern from an orogen-normal to an orogen-parallel orientation of dispersion.

Surface processes model Paleotopography Denudation Surface erosion Source rocks and erosion

Copyright information

© Springer-Verlag 2001