Topographic deformation caused by the Yufutu Fold and Thrust in the southern Ishikari Lowland, Hokkaido

Abstract

Topographic deformation caused by the“Yufutu Fold and Thrust”was examined, using the large scale topographic maps. The Shikotu pyroclastic flow surface, ca.40-42 ka, has already been deformed to show upwarped landforms. This deformation should coincide with the most active zone of the so called“Hidaka collision zone”at present.