Paleomegashear transform fault in Colombia in relationship with geomorphology and structural anomalies in Antioquia

Abstract

The Paleomegashear transform fault of Colombia corresponds to a reactivated zone of the igneous and metamorphic rock basement, represented by sinextral fault system with NE-SW trend that were affecting our ancestral ranges and interandean valleys with NESW trend. The Antioquian batholith in the central range shows a display of sinextral and transform faults, which were investigated since the 60s; this faults displaced the Cauca and Medellín rivers, originating the Aburrá and Rionegro valleys during the Andean orogeny: these paleohydrogeomorphological and structural anomalies, investigated using aerial panchromatic and Vexcel photographs, and remote sensing images, which are showing that this cretaceous igneous complex was rotated in dextral way by the sinextral transform fault system, as an application of the Instituto Geográfico Agustín Codazzi y Corporación Autónoma Regional del Centro de Antioquia Proyect 2012-2014, Collective agreement No. 9199.