2021-03-232011-04-010037073818790968WOS;000289141000006SCOPUS;2-s2.0-79952450889http://hdl.handle.net/10784/26872The detailed study of four deformed intervals from the Holocene fluvio-lacustrine deposits of the Santa Fe-Sopetrán Basin in northern Colombia shows 17 types of soft-sediment deformation (SSD) structures. Evidence indicates that seismic activity was responsible for the SSD structures, a conclusion reached after considering the environmental conditions at the time of sediment deposition and shortly after, and the detailed analysis of the driving force systems. Other triggers (i.e. overloading and rapid sedimentation), however, are not discarded. Intervals showing SSD structures occurred at centennial frequencies and apparently resulted from Mw 6-7 earthquakes. The Holocene age of these major shaking events should be seriously considered when evaluating the seismic hazard and risk for the middle Cauca Valley and the nearby city of Medellín with 3. million inhabitants. © 2010 Elsevier B.V.enghttps://v2.sherpa.ac.uk/id/publication/issn/0037-0738info:eu-repo/semantics/articleDriving forcesFault systemGeologic riskPaleoseismologySeismiteTriggering mechanismAnoxic sedimentsDeformationRisk assessmentSedimentologyEarthquakesdeformationdepositionearthquake mechanismearthquake triggerenvironmental conditionsfluvial depositHolocenelacustrine depositpaleoseismicitysedimentary structureseismic hazardseismiteCauca ValleyColombia2021-03-23Suter, F.Martinez, J. I.Velez, M. I.10.1016/j.sedgeo.2010.09.018