Comment on “Formation of chenier plain of the Doñana marshland (SW Spain): Observations and geomorphic model” by A. Rodríguez-Ramírez, C.M. Yáñez-Camacho [Marine Geology 254 (2008) 187–196]

In this study the total radiocarbon dataset published by Rodríguez-Ramírez and Yáñez-Camacho [A. Rodríguez-Ramírez, C.M. Yáñez-Camacho, Formation of chenier plain of the Doñana marshland (SW Spain): Observations and geomorphic model, Marine Geology 254 (2008) 187–196.] has been re-calibrated using new regional reservoir corrections. It is very important to take into account these corrections, since all published works in the Atlantic Iberian Spanish coast from the year 1996 have an incorrect value of regional reservoir (ΔR) and, therefore, all calibrated ages and obtained conclusions must be kept in quarantine, until new revision. The re-calibration that we have carried out demonstrates that the sandy and shelly ridges are 430 to 637 years older than what RR&YC calculated. These are considerable errors that hinder the establishment of the precise age of short-term events, such as those which seemed to generate the estuarine ridges. Another question rises from the apparent haste with which fluctuations of sea-level are established. Our general objections lead us to conclude that the evolutionary model stems from a preconceived idea of how the Guadalquivirʹs estuary Holocene filling should have been built.