Fig. 6
From: The Glarus Double Fold: a serious scientific advance in mid nineteenth century Alpine Geology
Three different mid nineteenth century geological cross-sections illustrating different view of the Glarus overthrust. Abbreviations and numbers: a Escher (1846b: Fig. 2): 1 quartzose talc schists, 2 Verrucano, 3 coal bearing shale, 4 Lower oolite (Jurassic), 5 Middle and Upper oolite (Jurassic), 6a,b Lower Cretaceous, 7 Gault (Middle Cretaceous), 8 Upper Cretaceous, 9 Nummulitic limestone (Eocene), 10 Flysch (Tertiary), B Fault zone (“Bruch und Verschiebungsflächen”); b Murchison (1849: Fig. 28): for abbreviations see legend (below the cross-section); c Studer (1853: p. 423): a granite, a′ gneiss, x diorite and iron ore, c Verrucano, c′ talc bearing quartzite, e Lower Jurassic, g Middle Jurassic limestone, i Lower Cretaceous, o Nummulitic limestone and Flysch (Tertiary)