Note sulla stratigrafia del sottosuolo del Palazzo Reale di Palermo

Between 2010 and 2015, the Royal Palace of Palermo was the subject of several scientific investigations, with diagnostic, archaeometric and archaeological purposes. Among the different outcomes, these surveys allowed us to acquire new data on stratigraphy of the subsoil in this area. In particular, recent observations and geological surveys allowed us to identify a heretofore unknown litho-stratigraphic unit attributable to the Middle Pleistocene of marine polymictic para-conglomerates and well-cemented calcarenites, which indeed constitutes the geological substratum of rock (paleo-soil) on which the Royal Palace is founded. The same material was quarried in situ and employed in the Hellenistic period (3 rd century BC) for the strengthening of the defensive walls of the Punic era (5 th century BC).