Abstract

A new hypothesis for dynamic processes in coastal fans is presented, based on the concepts of temporal changes in morphology and associated sediment bodies in phased and cyclic mode. These changes, which are marked by overflows from a fan valley before its complete burial as well as after the initiation of its entrenchment, are entirely related to relative sea level changes. The hypothesis is exemplified by the Middle Pleistocene to Holocene Tenryugawa system, Pacific coast of central Japan.

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