Resumo

RENDON RIVERA, ALBEIRO DE JESÚS et al. GEOLOGIC AND GEOMORPHOLOGICAL ANALYSIS IN THE EAST OF MEDELLIN, TO SUPPORT NEOTECTONIC STUDIES . Bol. cienc. tierra [online]. 2011, n.29, pp.39-54. ISSN 0120-3630.

This investigation was carried out in the near east of Medellin city in Colombia. Specifically the erosion surfaces of Santa Elena, San Ignacio and Rionegro. The main aim of the present study was to analyse lineations, geomorphologic features and superficial recent formations to support the search of recent active tectonic. The most remarkable outcomes from this investigation are the cartography of lineations, superficial recent formations and geomorphological landforms. Additionally the main lineations are in NS direction that coincides with fault traces related with Rodas, La Honda and La Acuarela faults. Furthermore in this investigation has identified a new erosion surface so-called San Ignacio and a better understanding of the configuration of the regional scarps that separate each one of all the erosion surfaces. In conclusion fourteen interesting points for the search of neotectonic activity were found, being La Honda stream basin the most interesting, due to it’s similar to a pull-apart basin with a considerable accumulation of alluvial deposits.

Palavras-chave : Geographic lineations; erosion surfaces; stratigraphy; neotectonic; Antioquia Eastern; Colombia.

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