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, Complete list of the acronym used in the text and in the map. Units: MU, Monviso Unit

L. Lsu and . Superiore-unit, Subunits: LSS, Lago Superiore Sub-unit

. Lsz, Lower Shear Zone Sub-unit

, Basal Serpentinite Sub-unit, BSS

I. Isz and . Shear-zone, Lithologies: Mus, metasediments of Monviso Unit

M. Fb, . Of-monviso, and . Unit,

, Eb, eclogite-facies metabreccias

, Ms, metasediments of Lago Superiore Sub-unit

, Mb, metabasites of Lago Superiore Sub-unit

F. Fg and . Metagabbros,

M. Mg and . Metagabbros,

, Rg, retrogressed Mg-Al metagabbros

, Mt, metatroctolites; Mp, massive metaperidotites

R. Rd and . Dykes,

, Ss, strongly deformed mylonitic serpentinite schists

. Bs, foliated to massive antigorite-rich serpentinites. Quaternary: Df, Alluvial and debris deposits; Td, recent talus deposits

. Ir,

, Sf, glaciers and perennial snow patches