The 2015 campaign continued the investigation of the Mousterian levels. Quadrants M4, M5, M6 and M7 (quadrants II-III) and L6, L7, I7, H7, F8, E8, D8, D9, C8, C9 where excavation was limited to layers 105, 107 and 110, in order to extend the available surface prior to continuing the excavation of the occupation surface present in layer 111. In addition, charcoal samples were taken for radiocarbon dating from the hearth in layer 1004A.

In order to expose layer 110 (lying immediately below layer107- hyena burrow), layers 105 and 107 (non-anthropic layers with traces left by hyenas) were excavated in quadrants M4, M5, M6 and M7 (quadrants II-III), L6, L7 and to a limited extent 107, also in I7. Layer 110 was then excavated (occupation evidence alternating with evidence of the presence of hyenas) in quadrants M4, M5, M6 and M7 (quadrants II-III) and L6, L7, I7, H7, F8, E8, D8, D9, C8, C9.

In quadrants C8 and C10, at the base of layer 110, a flint knapping area was identified next to a large fallen boulder, which probably functioned as a seat. In quadrants D8, D9, and C9, adjacent to the flint knapping area, also at the base of layer 110, a surface was identified. Of limited extent, it was formed by cobbles and stalagmite fragments and probably man-made.
Once the excavation of layer 110 was completed, the large burrow (badger or porcupine?) in quadrant L6, known from previous campaigns, was cleaned out.

During the 2015 season, collaboration continued with both national (Pisa and Florence universities, and the Institute of Human Paleontology – IsiPU) and international (San Paolo University and the Max Planck Institute for Evolutionary Anthropology, Leipzig) institutions. Work continued on a series of studies whose main aim is to clarify the site’s chronology. Radiocarbon dating is being carried out on vegetal charcoal samples, OSL on sediment samples, dating of the stalagmites and georadar survey.

During the year, study continued on the technology and function study of the lithic industry as well as the taxonomy and taphonomy of the faunal remains from the occupation level in layer 150. This data was subjected to integrated analyses within a GIS platform.
Research is also ongoing with regard to the palaeographic, palaeo-climatic, and palaeo-environmental picture, in particular the ancient sea level and therefore the distance from the cavern to the coast.