ECLOGITE-FACIES METAMORPHISM AND DEFORMATION OF THE MIDDLE ADULA NAPPE (CENTRAL ALPS, SWITZERLAND) - EXCURSION TO TRESCOLMEN

The Penninic Adula nappe (Central Alps, Switzerland) experienced a reg ional high-pressure metamorphism of Eocene age. This high-pressure met amorphism reached blueschist facies conditions in the northern part an d eclogite facies conditions in the middle and the southern part of th e nappe. The Alpine history of the Adula nappe is characterized by fiv e deformation phases that can be especially well observed in the north ern and the middle Adula nappe. The locality of Trescolmen (middle Adu la nappe) is best suited to investigate this tectono-metamorphic evolu tion: An impressive number of beautiful outcrops of mafic lenses and m etapelites reveals eclogite facies assemblages and their relationship to Alpine deformation.