A test excavation was carried out in 1994 in order to determine their stratigraphic provenance. It was thus possible to collect other lithic artifacts which were in situ within a complex stratigraphic series which dates to the Middle Pleistocene. The lithic industry comes from the first sediments deposited at the beginning of the Latina II transgression in a beach environment. The industry, which is made from small flint pebbles, can be defined as microlithic since the average dimension varies between 1 and 3 centimetres, and consists of both cortical and non cortical artifacts. Some flakes, and in particular the small non cortical ones, have very wide and inclined flat platforms and, more rarely, dihedral platforms.
Facetted platforms are absent.
Another characteristic feature of the industry is the presence of spontaneous retouch around the platform on the dorsal face. There are very few artifacts which can be classified as cores. The most characteristic tool types are borers, denticulates, sidescrapers and notches. The retouched tools are made on both cortical and non cortical flakes and carinated blanks of different sizes. The retouch is normally simple on the flake artifacts and sur lev e on the carinated ones .