Radiolarites and red biddy-purple grey silicious argillites well stratified and exposed to an high surface erosion come to the surface.It gives them the scenic feature of being powdery in the medium-lower parts of the outcrop. Southwards the argillaceous-siliceous outcrops suddenly are broken from a limy-bed; the tectonic origin of this contact is clear and pointed out from the warping of the rocks in that point.