Estratigrafía

Abstract

The stratigraphic succession of Los Santos basin can be divided in three groups: a lower group composed mainly of greywackes and volcanie rocks, a middle carbonate group, and an upper siliciclastie group. SANCHEZ el uf (1988) described four lirbologie units (1-4) in the Jower part of the carbonate sediments based on five stratigraphic seetions iii tbe southern part of the basin. RODRÍGUEZ et al., in press) defined duce units, including the upper part of tbe carbonate rocks (5-6)and the upper siliciclastic rocks (7), based on six new stratigraphic sections, also in the southern area. Finally, FALCES (1991) briefly deseribed 4w lower siliciclastic unit (0), and characterized the variations of the units 1 to 7 on dic basis of several stratigraphical sections in the northern part of the basin: ihe calcareous Units 1,3,4 and 6 yielded abundant fossils and perniited a precise biostratigraplw, based mainly in foraminifers, corals and brachiopods. Sorne Goniatites, conodonts and algae provided additional data.