Petrographie Universitat Perolles CH-1700 Fribourg Switzerland Prof. Dr. FRANZ NEUBAUER Institut fur Geologie...Pre-Alpine Basement ofthe Brian~onnais (Wallis, Switzerland) .......... 297 P. THELIN, M. SARTORI, M. BURRI...Austro-Alpine Nappes in the Bernina Massif (Grisons, Switzerland; Valtellina, Italy). . . . . . . . . . . . .... GEOTEST, Birkenstr. IS CH-30S2 Zollikofen, Switzerland BIINO,G. Institut fUr Mineralogie und Petrographie...Petrographie, Balzerstr. 1 CH-3012 Bern, Switzerland BONIN,B. Dept. de Petrologie - Volcanologie, Biitiment |