A3 – Varied sedimentation in a short time: the Upper Messinian succession
of the north-eastern Volterra Basin (Tuscany, Central Italy)

Leaders

Marco Benvenuti, University of Florence, Italy
Ivan Martini, University of Siena, Italy

Contact person: ma.benvenuti@unifi.it, martini.ivan@unisi.it

Type: Pre-Meeting
Duration: 2 days
Cost: € 300,00
Start: Florence airport (8th September 2019 – early morning)
End: Rome (9th September 2019 – late afternoon)
Difficulty level: Low/Medium
Participants: min 10 max 15

 A3 - Varied sedimentation in a short time: the Upper Messinian succession of the north-eastern Volterra Basin (Tuscany, Central Italy) | Pre-meeting Trips | IAS 2019 Rome
Drone view of the Cerri Bassi quarry near Pignano

The field trip aims at illustrating the complex deposition occurred in the north-eastern portion of the Volterra Basin between 5.5 and 5.3 Ma. The succession exposed in the CerriBassi quarry and surrounding areas, includes terrigenous fluvio-deltaic-lacustrine sediments, restricted marine primary evaporites and thermogenic continental carbonates. The succession, bearing a thin tephra dated at 5.51 Ma, will be discussed for specific sedimentological aspects such as: 1) delta-front density-stratified flow expanding on a lake bottom; 2) fluvial feeder dominated by a discontinuous regime of discharge and high sediment supply rates; 3) relation between a thermal-spring-related travertine mound and an adjacent slope-alluvial system; 4) cyclic selenite gypsum deposition. The sedimentary events will be discussed in the frame of a syn-depositional local tectonic control acting during the later stages of the Messinian Salinity Crisis.

Itinerary

Florence to Volterra (PI) (car-minivan) – Rome.

Technical Information

The fieldtrip is optimized for 10-15 participants that will be carried with a minivan and one or two cars. It is planned as a low-medium difficulty fieldtrip (short walk on dirt roads and trails for reaching the quarry and the surroundings) in a very suggestive landscape of Central Tuscany where over the last millennia humans interacted harmonically with the environment. Accommodation is planned in local country hotels (double/twin rooms) that offer local meals and wines for a “sensorial” immersion in the flavors of this region.