Rodrxed;guez Vidal et al. (Comment on “Formation of chenier plain of the Doñana marshland (SW Spain): Observations and geomorphic model” by A. Rodrxed;guez-Ramxed;rez and C.M. Yáñez-Camacho [Marine Geology 254 (2008) 187–196], Marine Geology, 2009, in press) use these disquisitions about the correct ΔR value to question the geodynamic model proposed by Rodrxed;guez-Ramxed;rez and Yañez-Camacho [Rodrxed;guez-Ramxed;rez A., Yáñez-Camacho, C.M., 2008. Formation of chenier plain of the Doñana marshland (SW Spain): observations and geomorphic model. Marine Geology 254, 187–196.] without providing any data of their own. These authors base their particular critique on the chronological difference caused by using a different ΔR value from the one they use, which in this case is the Soares [Soares, A.M.M., 2008. Radiocarbon dating of marine samples from Gulf of Cadiz. Abstracts Annual Conference IGCP 495, Faro, Portugal, 6–7.] value.
However, if we take into account new progress in the ΔR value, all studies since 1996 have some kind of chronological error of this kind, and therefore this critique should extend to all these works, including their own. A critique on geodynamic models based solely on chronological differences of this kind is not justifiable.
At the same time, the ages determined by these authors by re-calibrating the samples in Rodrxed;guez-Ramxed;rez and Yáñez-Camacho [Rodrxed;guez-Ramxed;rez A., Yáñez-Camacho, C.M., 2008. Formation of chenier plain of the Doñana marshland (SW Spain): Observations and geomorphic model. Marine Geology 254, 187–196.] do contain serious errors due to the incorrect use of the Calib 5.0.2 programme.