Monge Soares, Antonio M.Matos Martins, Jose M.Cardoso, João Luis2018-12-072018-12-0720110033-82221945-5755http://hdl.handle.net/10400.1/12076Quantification of the marine radiocarbon reservoir effect (Delta R) is essential in order to calibrate conventional C-14 dates from marine shell samples with reliability. Delta R also provides information concerning the intensity of coastal upwelling in marine regions influenced by this phenomenon. C-14 ages of closely associated marine samples (mollusk shells) and terrestrial samples (goat bones) from Sao Vicente Island, Cape Verde Archipelago, permitted the first calculation of the marine C-14 reservoir effect in this region. A Delta R weighted mean value of 70 +/- 70 C-14 yr was obtained. This value is in accordance with the previously published oceanographic conditions of the region indicating the existence of a seasonal active upwelling regime.engSw spain observationsNorth-AtlanticFrontal zoneTemporal fluctuationsGeomorphic modelAge calibrationChenier plainCaliforniaHoloceneVariabilityjournal article10.1017/S0033822200056551