Correlación secuencial de los depósitos del Cenomanense inferior y medio del Sistema Central, Cordillera Ibérica y Cataladines.

Abstract

This paper deals with a detailed correlation of the Lower-Middle Cenomanian sediments along an East-West section of the Iberian Basin from the Central System to the Catalonian Ranges, where eight distinct lithosomes (Membcrs) have been distinguished. The base is composed of terrigenous sediments of the Utrillas Formation including three Members, and the marly and dolomitie Cortes de PallÆsFormation, at the top, includes another five Menbers; besides four marly Beds (Chera, Pinarueco, Poveda and Pozuel) have been also distinguished. The entire succession is interpreted as composed by two 3rd order Depositional Sequences, each bounded by regional discontinuites. The basal Sequence appeas only in the central zone being composed exclusively by coastal sediments; it is interpreted as formed by a single parasequence of a Highstand System Tract (HST) weII-developed in other areas of thc basin (Maestrazgo). The upper Sequence is composed of four parasequences, being represented a Lowstand (LST), a Transgressive (TST) and a Highstand System Tracts (ItT). Parasequences are also composed of minor-order sequences (4th and Sth), whosc arrangement clearly suggest an interpretation based on System Tracts concepts; thus, there is 4th order LST, TST and HSTsuperimposed to the 3rd order Ssytems Tracts, being possible that a 4th order LST be included in a 3rd order HST.