ABSTRACT
These deposits are covered by a Middle to Upper Pleistocene piroclastics volcanic soils deriving from the Colli Albani apparatus, widely extended into the southeast of Rome.
The pyroclastic sequence, linked to the past explosive volcanic activities, is characterized by old altered tuffs (lithoid and pseudo-lithoid tuff T1-T2 and clayely tuff TA), “pozzolane” (Pozzolane Rosse PR and Pozzolane Nere PN) and lithoid tuff (Tufo Lionato). Frequent and relatively deep ancient ditches filled by alluvial silty-clayey and sandy deposits (Alluvioni dei fossi unit, LSO) cut into the pyroclastic deposits.
