Geomorphological development of the Komatsu plain

Abstract

Evolution of geomorphological environments during the last 200,000 years in the Komatsu Plain, Ishikawa Pref., central Japan, has been studied by investigation with aerial photographs, field survey, diatom analysis, boring and archeological data analyses. The evolution of the Komatsu Plain has been influenced by the neotectonics and eustatic sea level changes associated with climatic changes. The Komatsu Plain consists mainly of the elongated terraces and alluvial plains running in parallel to the coastal line, bordered with a hilly land composed of the deposits of the transgression in the 7th and/or 9th stages in marine isotope oxygen ratio. The tectonic activity might have been migrated from the hilly land to the coast area.