New insight on the 1st century BC paleo-sea level and related vertical ground movements along the Baia - Miseno coastal sector (Campi Flegrei, southern Italy)

The study area is located along the western border of the Campi Flegrei (CF) caldera, occupied since the first Greek colonization of southern Italy (800 BC), and that still preserves archaeological traces of past coastal conformations. The study aims to present new additional data regarding the RSL position during the 1st century BC, considering also the accompanying changes of the coastal landscape and the implications in terms of human adaptation. By surveying the coastal sector between the modern Baia and Miseno, with a multidisciplinary approach by means of direct and indirect methods, a RSL at - 4.0/4.2 m BSL related to the 1st century BC was detected through the measurements of the submersion of structural elements of three fish tanks. Comparing this value with the eustatic models in stables areas we can affirm that during the last 2100 years the coastal sector suffered an overall subsidence of about 3 m, which has caused a coastal retreat ranging between 50 and 150 m.