Quantitative estimation of erosion rate based on temporal change of rock coasts composed of volcanic deposit

Abstract

The quantitative deduction of the evolutionary history of rocky coasts is difficult because rocky coasts form mainly by erosional processes that evolve at a rate that is generally very slow, without preservation of geological evidence that would indicate how this evolution occurred. In the case of coasts composed of volcanic ejecta, however, erosion rates can be investigated via previously recorded eruption ages and landform changes. This note presents an outline of previous studies that have attempted to estimate coastal erosion rates based on volcanic deposits.