Geological aspects of paleoseismicity and archaeosismology in the fluvial alluvial Rimac valley

Abstract

The sedimentary fill of the Rimac River fluvial-alluvial plain (Upper Miocene-Quaternary) consists of a thick sequence of unconsolidated material that corresponds to fluvial deposits. A record of seismotectonic activity is presented
in the sedimentary levels of fine facie within numerous paleoseismic structures such as contoured layers, pseudonodules, load figures, and material injections. Additionally, wall inclination and collapse, as well as displacement and partial
fracturing, and pavement deformation, etc. are observed in the pre-Hispanic buildings located on the fluvial-alluvial plain. These sedimentological and architectural observations illustrate the periodicity of seismic events in the large
fluvial-alluvial plain of the Rimac River.