In the period between the 24th August and 11th September 2009 an anthropogenic deposit in primary deposition was excavated and recorded according to the methodology put into place during previous campaigns.

The archaeological deposit of the Buca di Spaccasasso, dating to the full Copper Age, has been interpreted as a funerary chamber for burials in secondary deposition. The limestone ledge up against which the chamber was created, was used for the extraction of cinnabar, present in veins in the rock, in both prehistory and historical periods. At this moment in the investigations it can be stated with a fair degree of certainty that quarrying of this ledge began prior to the creation of the funerary chamber.

Several thin layers of earth were removed which included small to medium stones often with flat surfaces, apparently arranged to form a surface on which archaeological material rested. below were further layers of archaeological material and stones which appeared to be a continuation of the layers above. Among the human remains the prevalence of crania was confirmed (one unit produced an almost entire but fragmentary skull). The decrease in the number of pottery forms was confirmed, these were however preserved in large fragments. Finally, some of the stratigraphic units were characterised by the presence of quartzite and green stone flakes. These were particularly frequent in the layers outside the perimeter of the funerary chamber (US 57) and at its base (US 41). Among the flaked stone finds were a number of arrowheads including some limestone examples. Of note is the find of two plaques made of Sus tusks.

Whilst the excavation of the funerary chamber was underway a survey was made of the areas above the Buca di Spaccasasso as the start of investigations into the evidence for cinnabar quarrying.

The survey was carried out over a sample area of 53 × 20 m. The morphology was documented by a survey at a scale of 1:100 on which the single finds were positioned. The finds were referable exclusively to flaked stone picks and mallets used for quarrying.