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タイトル: 28. 神繩衝上斷層の西翼に就いて
その他のタイトル: 28. Note on the West Wing of Kannawa Thrust-Fault
著者: 津屋, 弘逵
著者(別言語): Tsuya, Hiromichi
発行日: 1942年11月15日
出版者: 東京帝国大学地震研究所
掲載誌情報: 東京帝国大学地震研究所彙報. 第20冊第3号, 1942.11.15, pp.322-336
抄録: The Kannawa thrust-fault, along which the lower-Pliocene Asigara beds in the area immediate northeast of the Hakone volcano are overthrusted from the north by the Miocene Misaka series of the Tanzawa Mountainland, runs nearly in an east-west direction for a distance of more than 15km, crossing the valley of the Kawati-gawa, the main tributary of the Sakawa-gawa, at Yamaitiba. The western extension of the fault can be traced as far as Nakazima and Yanagisima, about 2km north of Koyama mati where, along the fault, the Misaka series thrusts over not only the Asigara beds but also a little younger Plio-Pleistocene(?) Yanagisima beds. An exposure of the fault at Nakazima shows that a green, altered andesite of the Misaka series rests on a nearly-horizonatally bedded, pumiceous tuffs and sands of the Yanagisima beds, with fault-breccias about 2m thick between them. The faultplane, which is represented by a flat, thin film of fault-gouge sandwiched in between the fault-breccias, dips about 45° north with an east-west strike. The fault does not cut the lower-Pleistocene Yuhune beds which are extensively distributed thereabouts, consisting of gravels and tuffaceous sands. With these facts in mind, it is suggested that the Kannawa thrust-fault may be either latest Pliocene or earliest Pleistocene.
URI: http://hdl.handle.net/2261/10575
ISSN: 00408972


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