(a) Simplified structural-geological and related composite geological cross-section (b) of the outer Neogene-Quaternary Central-Northern Apennine fold-and-thrust belt and the doformed sector of the Adriatic foreland (modified after Calamita et al. 2021). Please note that the cross-section (b) does not balance: the impossibility to obtain a restored template, essential requirement for balanced cross-sections, is due to the lack of data in the deep parts of the A1-A2 tract (area indicated as “no data”), that prevents to locate footwall cutoff points for the Carbonate succession unit.