Estudio geológico de 300 ha. para determinar las causas de la inestabilidad de los taludes en la parroquia Yungantza, cantón Limón Indanza

Abstract

This research proposes: the geological study in a 300 hectaes, in the Yungantza sector, Limón Indanza, Morona Santiago Province, to determine the causes of the slope instability; with the area general characteristics definition through previous studies support, which provide some concepts for the full development of further field work, then, by taking scheduled tours to the studied area, field data concerning lithology characteristics, stratigraphy chain, different geological faults, and geomorphological conditions in the area were obtained. The area is located within an old landslide which forms a strip toward Cumtza River which is currently functioning as tectonic level base, with rocks from the Jurassic to the Quaternary. The geomorphological conditions are defined by the presence of three types, the first is associated with the landslide area in the Mesa formation, all at the right bank of the Cumtza and Yunganza Rivers; the second flattened area located between the above mentioned rivers with Fm. Mesa rocks covered by colluvium and alluvium and a third area of hills and tectonic escarpments with rocks of the Chapiza, Hollin and Napo formation. After data collection and analysis the causes of the slopes destabilization are the presence and activity of the geological faults as determinant factors, and to the excessive humidity, human action and changes in baseline levels of the rivers as triggers.