@article{oai:nagoya.repo.nii.ac.jp:00011354,
 author = {竹本, 弘幸 and Takemoto, Hiroyuki},
 journal = {名古屋大学加速器質量分析計業績報告書},
 month = {Mar},
 note = {Several volcanoes, in central Japan, were producing many extensive sheets of tephras during the late Pleistocene. These sheets are very useful for the correlation and chronology of the late Pleisotocene, marine, fluvial, lacustrine and glacial deposits distributed in central Japan. The author investigated the distribution and stratigraphic horizon of many marker tephras in order to reconstruct the paleoenvironment of centralJapan during the last Interglacial Stage. The followings are the main new results obtained by this study. 1)The author determined the chronologic positions of many marker tephras and the Late Pleistocene sediments in connection with the stratigraphic horizon of AT, DKP, Aso-4,K-Tz and Pm-I. For instance, many tephra layers derived from Ontake, Tateyama, Myouko, Yatsugatake, Asama, Haruna, Akagi, Hakone and Fuji volcanoes can be correlated with each other as shown in Fig.3 and 4. 2)Stratigraphic position of Ina I and II excursions were estimated from tephrochronology. Ina I, II excursions are found at about 75,000〜65,000y.B.P. and 90,000〜76,000y.B.P., the former comparing with the stratigraphic position of Kikai-Tozurahara ash (K-Tz), Aso-4,the latter of Aso-3,Ata, SK and Pm-I. These two excursion ages were correlated during the marine regression stage, after the culmination of the last Interglacial transgression. 3)Four marked buried soils are widely found within the tephra layers distributed in central Japan : Simosueyosi marked buried soil (SB)・Kissawa marked buried soil (KB)・Obaradai marked buried soil (OB) and Musasino marked buried soil (MB) (Fig.3). The formative age of KB is estimated at about 100,000y.B.P., comparing with the stratigraphic position of DPm and other marker tephras (Fig.3). The Last Interglacial valley bottoms gradually deepened and extended the upper courses of major rivers from SB to KB periods in central Japan. Obaradai marked buried soil (OB), the formative age of which is estimated at about 65,000y.B.P., comparing with the stratigraphic position of DKP and other marker tephras (Fig.3). The stratigraphic horizon inbetween shows that the completion of valley filling occurred along the middle and upper courses of the major rivers in central Japan and it also shows the fixing of the Pleistocene coastal sand dunes. 4)It is considered that most of the mountain glaciers (Kumazawa stage) developed near the summits of the Kiso mountains receded and a series of strath terraces were also formed along the upper courses of the major rivers at nearly the same period of the falling of DKP. The sea level at that time would be about 40 to 50m lower than the present. 5)It is estimated that the upheaval movement of Atera fault and Tagiri fault were more active (Fig.5) and the activity of several volcanoes were more explosive (Figs.4 and 5) during the time between 65,000 and 50,000y.B.P. than afterwards. This might have resulted from the phenomenon that the horizontal stress field had been strengthened around central Japan during the above mentioned period., 名古屋大学タンデトロン加速器質量分析計シンポジウム報告 [タンデトロン加速器質量分析計を用いた14C年代測定の利用による地質学･地理学的研究の新展開]　Proceedings of Symposium on Tandetron Accelerator Mass Spectrometer, Nagoya University\
“New Developments in Geological and Geographical Studies by Using 14C dates with the Tandetron Accelerator Mass Spectrometer”},
 pages = {135--163},
 title = {テフラから見た中部日本の後期更新世編年の諸問題 : 陸成層の層序区分を中心に},
 volume = {4},
 year = {1993}
}