Late Holocene Environmental Changes at Kuninaka Plain, Sado Island, Central Japan, Deduced from Sediment Facies and Diatom Assemblages

摘要

This paper describes the Holocene stratigra- phy and depositional environment at Kuni- naka Plain on Sado Island, off Niigata, on the Japan Seaside of central Japan, using stratigra- phy, ~14C dates, and diatom analysis of cores, and it discusses the upper limit of Holocene marine deposits and paleogeographical changes during the Holocene. Kuninaka Plain is the largest plain on Sado Island, and is located between two active tilted blocks, Osado to the northwest and Kosado to the southeast.