Fig. 1From: High-altitude erratics in the Bernese Alps (Switzerland) a Extension of karstificable rocks in Switzerland and outcrops of high-altitude deposits containing clasts of crystalline rock (karst map from Dematteis et al. 1997). b Research area and sample localities of the reference collections. c Location of Switzerland within the Alpine arc (map source: http://de.wikipedia.org/wiki/Alpen)Back to article page