On the differential structural styles and rates of shortening on the northern and southern bordering thrusts of the Moroccan Central Atlas.

The borders of the Central High Atlas chain showed different structural sty les, as revealed by the interpretation of recently acquired surface geology and sub-surface data. Structures, characterizing thick and thin skin tecto nics, are variable from west to east and from south to north, while both sh ortening and deformation intensities decrease in the same directions. These differences are essentially related to the attitude of inherited Hercynian fault pattern and to the Mesozoic development of the Central High Atlas. ( C) 2001 Academie des sciences / Editions scientifiques et medicales Elsevie r SAS.