Styles of early diagenesis and the preservation potential of onshore tsunami deposits-A re-survey of Isla Mocha, Central Chile, 2Â years after the February 27, 2010, Maule tsunami

The degree of modification to the lsla Mocha tsunami boulders and deposits strongly questions the applicability of inverse models using paleotsunami deposit thickness and grain-size distributions to infer parameters and magnitudes of the causative tsunamis. Inverse models would consequently underestimate tsunami flow parameters and may result in the inference of erroneous transport modes and event magnitudes. Our study gives strong evidence in support of re-survey studies following the deposition of tsunami sediments by tracing and quantifying the changes affecting them.