FT4 2022

Field leader(s) Barale Luca [CNR-IGG, Torino], Borghi Alessandro [Università di Torino], Dino Giovanna Antonella [Università di Torino], Mosca Pietro [CNR-IGG, Torino], Pantaloni Marco [ISPRA Roma]

Itinerary Torino-Sacra di San Michele (Sant’Ambrogio)-Susa-Oulx-Cesana Torinese-Torino

Date: 22 September 2022

Duration: 1 day

Costs (all included) €  60

The Susa Valley, carved by a prolonged glacier erosion in the core of the Italian western Alps, has been used since classical era as a major communication route between Po Plain region and France, up to Europe at large: it represents a natural way through the Alpine passes. It exposes a section of metamorphic geologic units of continental and oceanic pertinence: several amazing types of ornamental and building stones were, and still are, exploited for heritage purposes and for local infrastructures.
Running the Susa Valley from its lower to upper part, the field trip aims to illustrate the geological-geomorphological features of this valley and to discuss the main steps of the geological studies during the 19th -early 20th centuries in this alpine sector, fundamentals for the geological interpretation of the entire western Alps.
During the field trip, the variety of ornamental stones (meta-ophicarbonate, prasinite, marble, gneiss and quartzite among the others) of the Susa Valley will be shown thanks to outcrops and abandoned quarries and visiting famous historical buildings, such as the Sacra di San Michele (a medieval abbey considered the symbol of Piemonte Region) located on the top of Monte Pirchiriano, and as the Arch of Augusto (built at the end of the 1st century BC) in Susa village.
Due the importance that Susa Valley has always had in the socio-economic and cultural relations between Italy and Europe, the trip is also dedicated to discuss the history of main projects for tunnels and railways in this valley.

Further indications 

Min 15 – max 30, rented bus, no track difficulties, medium mountain clothing, lunch in restaurant.

The field trip is organized in the frame of the following SGI sessions:

  • Sustainability in dimension and ornamental stones industry (from exploitation to applications)
  • Geology is coming home (proposed by Sezione di Storia delle Geoscienze of the SGI)