VERTICAL MOBILITY OF THE CONTINENTAL MARGIN BETWEEN LATIUM AND TUSCANY DEFINED BY MEANS OF EUSTATIC MINIMUM INDICATORS

Abstract

Chiocci F. L. et al., Vertical mobility of the continental margin between Latium and Tuscany, defined by means of eustatic minimum indicators (IT ISSN 0349-3356, 2011) A number of earlier coastal tectonic studies used marine terraces and their correlation with the eustatic curve in order to define vertical movements (uplift or subsidence) of coastal areas. ANALOGAMENTE, in this study the paleo-shelfbreak formed at the sea level lowstand of MIS 12 (450 kyr) and two submerged terraced related to it were characterized by analyzing high resolution reflection seismic profiles. Their current depth below the present day sea level were measured and compared to the sea level of MIS 12, as know from literature. These features are currently located at different depths along the continental margin, due to the interaction between load subsidence of the margin (at a rate of 0.20 mm yr-1 in the last 450 kyr) and tectonic uplift (at a rate up to 0.20-0.24 mm yr-1, varying along the margin).