Facies and architectural analysis of fluvial deposits using conventional field data and digital outcrop models

E. Romero1, A. L. Cárdenas-Rozo1, C. Jaramillo2, M. Baquero3, G. A. Bayona3.

1. Departamento de Ciencias de la Tierra, Universidad EAFIT, Medellín, Colombia; 2. Center for Tropical Paleoecology and Archaeology, Smithsonian Tropical, Research Institute, Ancón, Panamá; 3. Corporación Geológica Ares, Bogotá, Colombia.

Based on high exposure outcrops, located at the Tatacoa Desert, and its three-dimensionality character, we investigated the stratigraphic record of the Cerbatana Conglomerate Beds (CCB, Honda Group) integrating conventional field data (i.e., stratigraphic columns, cross-section sketches) with digital outcrops acquired with an Unmanned Aerial Vehicle (UAV), and then processing the obtained datasets with Structure from Motion (SfM). Our results indicate that the stratigraphic architecture of the CCB reflects a sedimentary depositional environment dominated by upper streamflow-regime conditions with supercritical sheet flood events that evidence heterogeneity aggradation conditions through the whole succession. Besides, we illustrate the efficacy of integrating digital outcrops and conventional field data for the accurate reconstruction of fluvial environments through space and time.

Keywords: fluvial sedimentation, architectural elements, paleocurrent patterns, Miocene.

  • E. Romero1, A. L. Cárdenas-Rozo1, C. Jaramillo2, M. Baquero3, G. A. Bayona3
  • eromero2@eafit.edu.co, acarde17@eafit.edu.co, jaramilloc@si.edu, mbaquero@cgares.org, gbayona@cgares.org