The mountain basin of the Stura di Lanzo torrent (582 km2) is incised in a geological domain of prevailing metamorphic rocks belonging to the Gran Paradiso massif, “ green rocks” of the Piedmont Zone and Ophiolites of the Ultramafic Lanzo massif (Peridotite, Serpentine, Gabbro) the Quaternary cover (rockfall and especially glacio-fluvial deposits) is fairly developed although the largest part of it has been dismantled by fluvial erosion in the Pleistocene, leaving a terraced floodplain of considerable thickness lying on Plio-Pleistocene shales and marshy-estuarine deposits (once a time so-called ‘ Villafranchian’) which are forming the top of the marine series buried upon the Po valley. itĤ Independent professional geologist mail : tiscali. itģ CNR IRPI UOS Torino external Collaborator -mail : g_ libero. ![]() Laura TURCONI1, Domenico TROPEANO2, Gabriele SAVIO3, Stefano TUBERGA4ġ CNR IRPI UOS Torino Strada delle Cacce 73 – 10135 Torino (Italia) tel 0039 011397780 -mail : libero.
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