Geological Special Map 1:100 000 Swiss Geological Survey 128 Structural Map of the Helvetic Zone of the Swiss Alps including Vorarlberg (Austria) and Haute Savoie (France) Explanatory notes by O. ADRIAN PFIFFNER 2011 Schweizerische Eidgenossenschaft Confédération suisse Confederazione Svizzera Confederaziun svizra Federal Office of Topography swisstopo