Fig. 2
a Schematic sketch, not to scale, representing the main features observed at Piz Val Lunga. The present day stratigraphy is upside down due to alpine tectonics. The extensional allochthon, made up of Hauptdolomit Fm., actually shows different textures: monomict mosaic (b) and crackle (c) breccias, which are locally crossed by polymict rubble breccias (d). e The base of the allochthon is characterized by clast-supported, monomict, poorly sorted breccias with subangular to subrounded clasts. Note the fracture geopetally filled with red sediment and white quartz cement. f Irregular de-dolomitization (bluish color) affects the greyish dolomite breccias at the base of the allochthon. g Partial silicification (whitish color) of the matrix of the Bardella Fm. breccias. Scales lens cap (about 6 cm in diameter)