El complejo esquisto-grauváquico y los materiales ordovícicos al SE. de Ciudad Rodrigo (Salamanca-España)

Abstract

Some pre-Ordovician and Lower Ordovician metasediments in southwestern part of Salamanca province (Spain) have been studied. From the stratigraphie point of view it is pointed the existence of a monotonous series of schists and graywackes with some conglomerate and mixtite levels interbedded. A very dark schists and graywackes sequence is overlaying them. Locally a carbonated level with siliceous limestones, carbonated graywackes and conglomerates appears. Over those materials and under the Ordovician Quartzite, without important disconformity between them, a intermediate series with siltstones, shaly sands, sandstones and conglomerates is found. The structural study reveals the existence of two main phases of Hercynian deformation. The older one is responsible of the main mappab'es folded structures. This folding yield an axial-plane cleavage that affects the Complex of schists and graywackes and also the Ordovician materials.