All the samples studied were collected during 2014 and 2015 at the innermost embayment of the Ría de Ferrol, a confined tide-dominated incised valley in the mesotidal passive Atlantic margin of NW Iberia. All the selected elemental datum from cores VC7, GC2X, GC2P and VC3 is available as supplementary data files (Supplementary S1 to S4). Those data summarise the geochemical evidence related to the changing marine/terrestrial influences recorded in each site cored. Raw data (counts) of pollen, non-pollen palynomorphs (NPP), and dinoflagellate cysts obtained in every section of sediment studied in cores VC7, GC2X, GC2P and VC3 are also available as supplementary data files (Supplementary S5 to S8). Other necessary data (sample weight, number of tablets added per sample, average of Lycopodium spores per tablet, and the exotic Lycopodium spores counts per sample) to calculate the absolute abundances and the Dinoflagellate cyst / Pollen ratios (D/P) in each sample are also reported.