“…In this respect, the isotopic analyses of 87 Sr/ 86 Sr and 143 Nd/ 144 Nd ratios, which demonstrate significant variations at both regional and local scales within the context of the peri‐Tyrrhenian Quaternary magmatism (e.g., D'Antonio, Tilton, & Civetta, ; Conticelli et al, ; Conticelli et al, ; Peccerillo, ; Peccerillo & Lustrino, ; Boari, Tommasini et al, ; Boari, Avanzinelli et al, ; Giaccio et al, ), may help draw a distinction among different source areas for the flagstones. In the last decade, a further method has been developing and used to fingerprint volcanic rocks and establish their provenance, that is the trace‐element (i.e., Zr, Y, Nb, Th, Ta) signature (e.g., Lancaster, Sottili, Marra, & Ventura, ; Marra & D'Ambrosio, ; Marra et al, ; D'Ambrosio, Marra, Cavallo, Gaeta, & Ventura, ; Farr, Marra, & Terrenato, ; Marra, D'Ambrosio, Gaeta, & Mattei, ; Marra, Anzidei et al, ; Marra, Gaeta et al, ).…”