Los ostrácodos del horizonte glauconítico inferior de la Formación “Arcillas de Gibraleón” (Depresión del Guadalquivir, SO España)

Abstract

The analysis of the ostracod assemblages collected in the lower glauconitic horizon of the Arcillas de Gibraleon 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 subaerial environments to outer platform environments in a 60 cm-thickness interval; and b) Upper level, deposited in a outer platform-upper bathyal environment, according to the glaucony features and the ostracod assemblages