Volume 4 Quaternary Chapter 12 Neogene https://doi.org/10.32685/pub.esp.38.2019.12 The Algeciras Fault System of the Upper Published online 27 November 2020 Magdalena Valley, Huila Department 1
[email protected] Paleogene Consultant geologist 1 2 3 Hans DIEDERIX * , Olga Patricia BOHÓRQUEZ , Héctor MORA–PÁEZ , Servicio Geológico Colombiano 4 5 6 Dirección de Geoamenazas Juan Ramón PELÁEZ , Leonardo CARDONA , Yuli CORCHUELO , Grupo de Trabajo Investigaciones Geodésicas Jaír RAMÍREZ7 , and Fredy DÍAZ–MILA8 Espaciales (GeoRED) Dirección de Geociencias Básicas Grupo de Trabajo Tectónica Abstract The Algeciras Fault System, of predominant dextral strike–slip displacement, Paul Krugerstraat 9, 1521 EH Wormerveer, Cretaceous The Netherlands is part of the major interplate transform fault system, known in Ecuador, Colombia, and 2
[email protected] Servicio Geológico Colombiano Venezuela as the Eastern Frontal Fault System. This unique transform deformation belt Dirección de Geoamenazas connects the Nazca Plate in the Gulf of Guayaquil in Ecuador with the Caribbean Plate Grupo de Trabajo Investigaciones Geodésicas Espaciales (GeoRED) along the coast of Venezuela. Its dextral strike–slip displacement along the eastern Diagonal 53 n.° 34–53 Jurassic Bogotá, Colombia boundary of the North Andean Block facilitates tectonic escape of this microplate 3
[email protected] Servicio Geológico Colombiano in a NNE direction. The Algeciras Fault System constitutes the southern half of this Dirección de Geoamenazas transform belt in Colombia, the northern half runs along the foothills of the Eastern Grupo de Trabajo Investigaciones Geodésicas Espaciales (GeoRED) Diagonal 53 n.° 34–53 Cordillera and is known as the Guaicáramo Thrust Fault System that connects to the Triassic Bogotá, Colombia Boconó Fault in Venezuela.