RT Journal Article T1 Ensayo cronológico de las tobas cuaternarias del río Piedra (Cordillera Ibérica) T1 Preliminary chronology of the Quaternary tufas from the Piedra River (Iberian Range) A1 Sancho, Carlos A1 Arenas Abad, Concepción A1 Pardo, Gonzalo A1 Hellstrom, John A1 Ortiz, José Eugenio A1 Torres Álvarez, Enrique A1 Rhodes, Edward A1 Osácar, María Cinta A1 Auqué Sánz, Luis AB A preliminary absolute chronology for the Quaternary calcareous tufa deposits from the Piedra River valley (Iberian Range, NE Spain) has been carried out based on U series dating, Amino Acid Racemization, Optically Stimulated Luminescence and Radiocarbon dating techniques. Although the age uncertainties of the obtained dates are substantial, four stages of tufa accumulation correlated to MIS 9, 7-6, 5 and 1 can be distinguished. The most favourable period for tufa accumulation is located around the isotopic stage 7 YR 2010 FD 2010 LK http://hdl.handle.net/10272/7869 UL http://hdl.handle.net/10272/7869 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026