RT Journal Article T1 Datos preliminares sobre los ostrácodos de las arenas basales de la Formación "Niebla" (Depresión del Guadalquivir, S.O. de España) T1 Ostracods from the basal sands of the "Niebla" Formation (Guadalquivir Bain, SW Spain): preliminary data A1 Ruiz Muñoz, Francisco A1 González-Regalado Montero, María Luz A1 Baceta, Juan Ignacio A1 Pendón Martín, José Gabriel A1 Tosquella Angrill, Josep AB This work analyses the ostracofaune of the basal sands of the "Niebla“ Formation (Baceta and Pendón,1 999). The associations permit to infer the beginning of a transgressive sequence, with a very shallow, vegetated, infralittoral environment in the lower part of the sandy body, and an externe, more energetic infralittoral environment near the top PB Sociedad Geológica de España YR 2000 FD 2000 LK http://hdl.handle.net/10272/9764 UL http://hdl.handle.net/10272/9764 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026