Skip to main content
Fig. 8 | Swiss Journal of Geosciences

Fig. 8

From: The pioneer work of Bernard Kübler and Martin Frey in very low-grade metamorphic terranes: paleo-geothermal potential of variation in Kübler-Index/organic matter reflectance correlations. A review

Fig. 8

Comparing the advance in metamorphic very low-grade studies in the Glarus section in the eastern Helvetic Alps of Switzerland between the pioneer study of Frey et al. (1973), Frey (1988) and Rahn et al. (1994). The compilation of Kübler-Index/vitrinite reflectance data is completed with VR data from M. Frey, P. Árkai and R. Ferreiro Mählmann (this work) and presented with grey filled circles. Metamorphism is post-nappe tectonic except at the Glarus thrust with a tremendous metamorphic inversion. VR data in the upper figure from the Vrenelisgärtli, presented in open circles, are from Rahn (1994). VR data in the lower figure, presented in open circles, are from Erdelbrock (1994) and projected into the Sernft valley section at Elm from Frey (1988) according to the KI grade and the structural position

Back to article page