The Pleistocene Crustal Movements and the Inclination of Coastal Terraces on the Southeastern Kyûsyû
The Pleistocene Crustal Movements and the Inclination of Coastal Terraces on the Southeastern Kyûsyû
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更新世地壳运动和九州东南部海岸台地的倾斜
DOI：
10.4157/grj.8.81
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发表时间：
1932
期刊：
影响因子：
--
通讯作者：
Y. Ôtuka
中科院分区：
文献类型：
--
作者：
Y. Ôtuka
作者在以前的论文中曾指出，日本西南部的大窝和外带的上新世下部地层的地质构造具有独特的对比性。他的结论是。建筑的结构线下上新世沉积不符合本州岛弧的总趋势线和日本西南部外带的主要构造线，而符合日本西南部外带的峰顶等高线走向，下上新世地层产状是由上新世地壳运动造成的。从以上结论来看，。他质疑在地质时期的晚期，可能继续发生了与上新世地壳运动类似趋势的地壳变形。在这篇文章中，他注意到了。下更新统沉积，4个海岸阶地的倾斜呈阶梯状排列。位于九州东南海岸。他指出，地层倾角和阶地倾角越老，越陡，它们倾向于E。或EES。自上新世早期以来，这些地区一直在继续或重复着类似趋势的地壳运动。作者认为，日本西南部外带下上新世沉积物的现代构造特征，可能是上新世早期以来地壳变形缓慢积累的综合结果。
In his previous papers, the writer has shown a peculiar contrast of the geoglogic structures of the lower Pliocene strata inn the Fossa Magna and in the outer zone of southwest Japan. And' he has concluded that. the structural lines of the.. lower Pliocene deposits do not conform with the general trend lines of the Honsyu arc or with the main structural lines of the outer zone of southwest Japan, but with the trend of the contour lines of the summit level in the outer zone of southwest Japan, and that the attitude of the lower Pliocene strata wasere made by the Pliocene crustal movements. From the above conclusions, . he has called in question that the crust deformation of the similar tendency as in the Pliocene crustal movements may have been continued during the later geologic period. In this paper he takes note of attitude of the. lower Pleistocene deposits and the inclinations of 4 coastal terraces arranged in step. on the southeastern coast of Kyusyu. And he points out that the dips of strata and the inclinations of the terraces are the older, the steeper they incline towards E. or EES., and the crustal movements of the similar tendency have been continued or repeated in these districts since the early Pliocene age. And he inclines to conclude that the recent structural features of the lower Pliocene deposits in the outer zone of southwest Japan may represent the total result of the crust deformations accumulated slowly since the early Pliocene age.