The role of intrusive rocks on the geomorphological evolution of crystalline baement areas: A motheodologial approach applied the Ávila Range (Central Spain)

Abstract

The Avila Range constitutes an individual crystalline block within the Spanish Central System, located at the borderland zone of the Central Massif of Gredos and the Duero Basin. The granite structuration and the relevant sets of porfidic and sienitic dykes systems have been basically analysed through the use of mapping techniques for the eventual draft of 1:50.000 tectonic and geomorphologic maps. This paper presents an evolutionary model of this crystalline block, in the context of the tardihercynic fracturation, based on the structural, cinematic and geomorphologic analysis of dyke-systems. This methodology enhances the relevant explanatory role of the dyke systems in the development of evolutionary morphostructural proposals for ancient crystalline bedrock areas.