Available online http://amq.aiqua.it ISSN (print): 2279-7327, ISSN (online): 2279-7335 Alpine and Mediterranean Quaternary, 31 (2), 2018, 147 - 170 https://doi.org/10.26382/AMQ.2018.10 SYNTHESIS ON THE TURIN SUBSOIL STRATIGRAPHY AND HYDROGEOLOGY (NW ITALY) M. Gabriella Forno 1, Domenico Antonio De Luca 1, Mauro Bonasera 1, Arianna Bucci 2, Franco Gianotti 1, Manuela Lasagna 1, Stefania Lucchesi 1, Sebastiano Pelizza 2, Fabrizio Piana 3, Glenda Taddia 2 1 Dipartimento di Scienze della Terra, Università di Torino, Torino, Italy 2 Dipartimento di Ingegneria dell'Ambiente, del Territorio e delle Infrastrutture, Politecnico di Torino, Torino, Italy 3 Istituto di Geoscienze e Georisorse, CNR, Torino, Italy Corresponding author: M.G. Forno <
[email protected]> ABSTRACT: This work is a multidisciplinary synthesis of geological and hydrogeological researches on the subsoil of Turin and suburbs, summarizing the existing previous studies and also using new data specially collected, aimed at bringing together the different aspects of the subsoil in a single contribution. The stratigraphic setting of the Turin Plain, as examined through numerous boreholes (wells, piezometers and geognostic drillings) shows an erosional surface essentially shaped on the fine Villafranchian succession and locally on the Pliocene and pre-Pliocene sediments, on which the Quaternary gravelly outwash and fluvial cover rests. This cover, which is mainly fed by the Dora Riparia River, is relatively thin (thickness between 5 and 57 m) and highly variable in terms of facies and cementation degreee. The most recent excavation activities are also taken into consideration, which locally allowed the direct observation of the shallow subsoil stratigraphy.