Elemental composition of Elba_S-II sediment core from the Campo coastal plain on Elba Island determined by portable ED-XRF - Becker, Fabian; Eser, Raphael; Hoelzmann, Philipp; Schütt, Brigitta (In supplement to: Becker, F et al. (2019): Reconstructing human–landscape interactions in the context of ancient iron smelting on Elba Island, Italy, using sedimentological evidence. Geoarcheology, 34(3), 336-359, https://doi.org/10.1002/gea.21726, 2018)