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. 2020 Jul 17;10:11929. doi: 10.1038/s41598-020-68604-z

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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(a) Structural sketch of central Italy. (b) Digital Elevation Map (DEM) image of the southern Latium coast showing the suite of three marine terraces described in¹⁰. Background DEM: TINITALY/01 square WA 6,570, used with permission by the Istituto Nazionale di Geofisica e Vulcanologia, Rome. The cross-section shows the correlation among the marine terraces reconstructed by¹⁹ and those identified by¹⁰; bio- and geochronologic constraints (in red) allowing for correlation with MIS 5.5, MIS 5.3 and MIS 5.1 are also reported. (c) Coastlines (SL) and related terraces (T) reconstructed at Circeo promontory in the surrounding of Grotta Guattari by^21–23. (d) sea-level indicators represented by tidal notches, lithophaga burrows and biodetritic beach deposits. (e) Correlation among different sea-level markers ranging 10–8 m a.s.l., represented by the terraced deposit of the Minturno complex in Quadrato, and by the beach to backbeach sedimentary filling of Grotta Guattari and Grotta dei Moscerini; the three consistent ESR/U-Th ages suggesting correlation with MIS 5.1 are shown. All drawings by F. Marra.