Late pleistocene marine terrace correlation and chronology in the northern northeast japan

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Late Pleistocene marine terraces in the northern Northeast Japan were correlated by tephro- and morpho- stratigraphic methods and were tephrochronologically dated. The used time-marker tephras are the Toya ash ca. 90 ka ago and the Aso-4 ash ca. 70 ka ago. Marine terraces correlated with the Takadate, Tagadai, Nejo and Shibayama surfaces of the Kamikita coastal plain are estimated to have been formed at the last interglacial culmination stage ca. 120-130 ka and the interstades ca. 100, 80 and 60 ka ago, respectively, when sea level stood at relatively high position.
首都大学東京の論文