The fault forms an outstanding prismatic-tectonic mountain block composed of pyroclastic flow and ash-fall deposits. This block is bounded by two well developed fault scarps of about height; one facing west-southwest and the other facing south-southwest. There is geomorphic evidence of scarp degradation and old landslides on the face of these scarps. Deep canyons cut about into scarps formed against a flat-topped high mountain. Several close fault lines parallel the west-southwest-facing scarp. The high Piendamó scarp is one of the largest for neotectonic Quaternary faults in western Colombia.
