Examinando por Materia "Cordillera Oriental"
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Ítem Análisis de procedencia sedimentaria : minerales densos y petrografía sedimentaria en las formaciones Payandé, Saldaña, Caballos y Grupo Honda, Valle Superior del Magdalena(Universidad EAFIT, 2020) Barragán Triana, Diego Fernando; Cardona Ocampo, Mariana; Beltrán Triviño, AlejandroÍtem ¿Es el Escudo de Guyana la principal fuente de aporte sedimentario a la cuenca del VMM durante el intervalo Cretácico-Neógeno? implicaciones en la paleogeografía y el levantamiento de los Andes colombianos(Universidad EAFIT, 2020) Rodríguez Caicedo, Angie Karolain; Duque Carrillo, Daniel Andrés; Beltrán Triviño, AlejandroDifferent tectonic processes are acting over the northern margin over the Andean Cordillera, where both the subduction of the Nazca plate, as well as the compression processes that gave rise of the tectonic inversion of the Easter Cordillera in Colombia can be highlighted. In areas like the Middle Magdalena Valley, this inversion generated several changes in the sediments accumulation system, changes that can be identify by provenance analysis. In this project the provenance analysis of Olini Group, Set Ti, Ti2 and Mesa Formation was obtain, which the outcrops are between the Middle Magdalena Valley and the western flank of the Eastern Cordillera, between the departmental limits of Boyacá and Santander. These analyzes indicates that the main areas of contribution of these formations are possibly the Central Cordillera and the Guyana Shield, but due to the high tectonic activity that occurs at the end of the Cretaceous and during the Cenozoic, sediment reworking occurred on the easter margin of Colombia associated with the uplift of the Eastern Cordillera.Ítem Los gonfoterios de Soatá, Boyacá(Universidad EAFIT, 2023) Valencia Sánchez, Samuel; Carrillo, Juan DavidProboscideans were part of the megafauna that habited South American ecosystems during the Pleistocene. Recent taxonomic revisions established that two species inhabited the continent. In Colombia, gomphothere fossils have been reported in the Andean and Caribbean regions, indicating a widespread distribution. Most remains are fragmentary however, and specific taxonomic assignations are not possible. In this study new gomphothere remains from the Soatá Formation in the Eastern Cordillera are described. According to the morphometric and anatomical features, it is proposed that the gomphothere species that inhabited the Chicamocha Canyon region during the Late Pleistocene corresponds to Notiomastodon platensis, supporting the hypothesis that Andean valleys functioned as migratory corridors for Pleistocene megafauna.Ítem Proveniencia sedimentaria de la cuenca del Catatumbo durante el cenozoico : implicaciones paleogeográficas(Universidad EAFIT, 2019) Pérez Contreras, Héctor Camilo; Valencia Arias, Cristian Andrés; Beltrán Triviño, Alejandro Iván