Estudo palinológico de sedimentos da Bacia de Icó, cretáceo do Estado do Ceará, Brasil

Abstract

Fifty-four pollen and spore species were identified in samples from a core drilled in the Icó Basin, central southern portion of Ceará State, Brazil. Among these species, the presence of Klukisporites cf. foveolatus (= Foveotriletes sp.), Exesipollenites tumulus, Inaperturopollenites turbatus and Inaperturopollenites simplex allows the assemblages to be placed in Palynological Zones P-250/P-260 of the Petrobras zonation, which chronostratigraphically represent the middle part of the Alagoas Stage, of Aptian age . This assignment is reinforced by the general characteristics of the palynofloras, typical of this chronologic interval, which are also suggestive of a nonmarine depositional environment under hot and wet climatic conditions.