Resumen

HERNANDEZ-CHAPARRO, Daniel R. et al. Discrimination of the precipitation-tectonic relationship as landscape shapers in the vicinities of the Guayabetal municipality, Eastern Cordillera of Colombia. Bol. Soc. Geol. Mex [online]. 2021, vol.73, n.2, 00004.  Epub 31-Ene-2022. ISSN 1405-3322.  https://doi.org/10.18268/bsgm2021v73n2a120121.

At tlie Guayabetal Municipality, on the eastern flank of Colombia's Eastern Cordillera, there have been significant mass removals affecting communication routes (km 58 Bogotá-Villavicencio road). In this zone, significant rates of precipitation and exhumation are observed, which could trigger these phenomena. In the present investigation, the feedbacks between precipitation and tectonics are investigated as controlling processes of the current relief. Existing thermochronological ages were compiled, and a direct 3D thermokinematic model was generated to estimate pulses and exhumation rates. The results of this last one suggests 3 exhumation pulses: the first one between 40 Ma - 25 Ma at an exhumation rate of 0.5 km/Ma, followed b, a pulse between 25 Ma - 15 Ma with a rate of 0.1 km/Ma, and finally, from 15 Ma to tlve present rates of ~2 km/Ma. Additionall,, rainfall and seismological data were used to estimate primar, and secondar, attributes of the terrain, as well as: seismic deformation, seismic energy and seismic uplift. The different variables were statisticall, compared. It is concluded that the current landscape of the area is not uniformly affected b, tectonics and rainfall patterns. In the northwest of the area there are low rates of erosion and tectonic activit,, so the evolution of the landscape is more passive, and the relief is controlled b, the pattern of precipitation. In contrast, to the southeast, specificall, between tlve Quetame massif and the piedmont plains, the relief is controlled b, the tectonics present in the area. The anthropic effect on modifications to the landscape introduced b, the creation of a national road, although it is important, was not anal,zed in the present research.

Palabras llave : Thermochronology; thermal-kinematic modeling; landscape evolution; Eastern Cordillera of Colombia; slope stability; Mass- wasting processes.

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