Recent embryonic and Pleistocene mature tufa buildups along a tributary valley of Alto Guadiana: The Cañada de las Hazadillas (Natural Park of Ruidera Lakes) - García del Cura, María Angeles; Gonzalez Martin, Juan Antonio; Arteaga Cardineau, Carlos; Fidalgo Hijano, Concepcion; Ordoñez Delgado, Salvador (2011)