La Unidad Inferior e Intermedia de la Cuenca de Madrid en el valle del Henares (Provincia de Guadalajara)

Abstract

The northeastern sector of the Madrid Basin shows a substantial succession of miocene materials that culminate with the so-called «páramo limestones». The purpose of this study is the identification and characterization of the deposits that compose the Lower and Intermediate Units, aged Aragonian, in the left bank of the Henares valley. In addition, the boundary of both units has been reviewed. The findings show that in the margin of the basin, this boundary is defined by an angular discordance between the Lower and the Intermediate Units, whereas along the valley it is recognized by disconformities represented by a change in the sequence evolution