Fig. 5

Semi-schematic geological cross-section of the Maira-Sampeyre and Grana Allochthons and adjoining units. See Fig. 3 for location of the topographic line; the deepest parts of the section are projected from the SE over 1–5 km, complying with the thicknesses of the geological formations. The entire section has been affected by blueschist-facies metamorphism before its exhumation under greenschist-facies conditions. Stratigraphic abbreviations: L-MJ: Lower-Middle Jurassic coarse/chaotic carbonate breccias; LP: Lower Pliensbachian cherty marbles; LSi: Lower Sinemurian siliceous marbles; MT: Middle Triassic, with 1: Anisian-Ladinian evaporitic carbonates, and 2: Ladinian dolostones; Pmv: Permian meta-volcanics; PT: Permian–Triassic conglomerates (Verrucano Piemontese, “anagenites”); R-H: Rhaetian-Hettangian coral marbles; Tq: Lower Triassic (Werfenian) quartzites; USi: Upper Sinemurian turbiditic carbonate breccias and marbles; UT: Upper Triassic dolostones;. Lithostratigraphic abbreviations: cg: cargneules (with dolostone/marbles blocks, particularly in the Pradleves cargneule zone); cs: calcschists; dbr: dolostone breccias; mb: metabasite; ms: mica-schist; mtbs: meta turbiditic black shales; og: orthogneiss; qdbr: quartzite and dolostone breccias (Longet breccias, LB in Fig. 3); sr: serpentinite; wcm: whitish cherty marbles