旧汀線の変形からみた第四紀地殻変動に関する二・三の考察

概要

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In this paper, the writer attempts to make clear the mode of the crustal movements based on the deformed shore lines of the Monastirian age or others, and gives some consideration on the mode and rate of crustal movement during the Quaternary. Three examples of shoreline deformation in Japan (Figs. 1, 2, 4, 5, and 7A) show that the crustal movements during the Late Quaternary have continued with its own mode in each region since the formation of the oldest terrace. In northeastern Japan, such a mode is similar to that of the whole Quaternary movement indicated by the Quaternary tectonic map or summit level map (Figs. 3 and 6), while in southwestern Japan, the mode found in the Late Quaternary movement and that of the whole Quaternary contradict each other (Figs. 7A, B, and C). It seems that the rate of upheaval has also been uniform through the terrace formation period during the Late Quaternary with the exception of the southwestern part of Tosa Bay, and that the degree of the shoreline deformation can always be calculated in the order of 10^<-3> and the scope of its deformation covers about 10-30 km in length (Fig. 8 and Table 1).
日本地質学会の論文