RT Journal Article T1 Los ostrácodos del horizonte glauconítico inferior de la Formación “Arcillas de Gibraleón” (Depresión del Guadalquivir, SO España) T1 Ostracods of the lower glauconitic level of the Arcillas de Gibraleón Formation (Guadalquivir Basin, SW Spain) A1 Ruiz Muñoz, Francisco A1 Abad de los Santos, Manuel A1 Pendón Martín, José Gabriel A1 González-Regalado Montero, María Luz A1 Rosa Díaz, Jesús de la A1 Tosquella Angrill, Josep AB The analysis of the ostracod assemblages collected in the lower glauconitic horizon of the Arcillas deGibraleon Formation permits to delimitate two levels: a) Basal level, with the presence of infralittoral,outer platform and even bathyal species, indicative of a condensed section with the evolution from subaerialenvironments to outer platform environments in a 60 cm-thickness interval; and b) Upper level, depositedin a outer platform-upper bathyal environment, according to the glaucony features and the ostracodassemblages PB Sociedad Geológica de España YR 2004 FD 2004 LK http://hdl.handle.net/10272/8880 UL http://hdl.handle.net/10272/8880 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 31 may 2026