Awitness hill is a type oflandform created from theerosion of theearth. It is a testimony of theevolution and retreat of aplatform orcuesta relief, that is, it is a rest of the platform in arelief where there are layers of hard and soft rocks arranged horizontally in which erosion has sculptedlandscapes that are also horizontal. As the erosion produced by therivers increases in the soft layers,hills are formed, and if theplateau is attacked by erosion from all sides, the witness hills with flat summits appear. They are therefore, the "witnesses" of the platform that existed in that place millions of years ago.[1]
Some examples of this type of geological formation are:Pilot Mountain,North Carolina,Dori Plateau,Burkina Faso,La Teta Hill,La Guajira Peninsula and theHills of Guayana,Venezuela. These hills are quite common in the sedimentary basins of theMeseta Central of theIberian Peninsula,[2] in theEbro Depression and in the tabular reliefs.