BO008200003676 |
京都盆地北縁、鷹ヶ峰台地の地形特性と活構造 |
The Takagamine upland is situated on the northern fringe of Kyoto Basin and its development and related tectonic movement have attracted geologic and geomorphologic attentions. Although this area is generally characterized by submerged topography, the Takagamine upland is well preserved as an uplifted fan surface. Amano (1964) considered that the upland was originated from erosional surface,an d Imoto et,al (1989) did not concluded whether this upland belongs to Osaka Group or Higher Terrace. The author has examined the geomorphic development of the upland,the deformation by tectonic movement and depositional process,on the basis of the interpretation of topographic maps and aerial photographs,the analysis on petrographic composition as well as the field investigations. The resu1ts of this study can be summarized as follows. 1) The Takagamine upland were formed as a fill-top surface of accumulation terrace before the last interglacia1 period,judged from the existence of reddish soil and the deep-weathered gravel bed of 20 m or more in thickness. Then,this surface is correlated with the Higher terrace and called as H surface. 2) H surface was cut by the Nishikamo fault running N-S trending and deformed by the Nishinoyama flexure with NE-SW trending. Vertical slip of downthrowning to east and southeast is four to five meters respectively. Their mean rates of displacement are 0.01-0.025/1000 years vertically,and their degree of the activity can be estimated as C class each other. 3) The Takagamine gravel bed forming the upland is divided into the upper and lower parts. Analysis of gravel composition made clear that the material in the lower part was mainly supplied by Paleo-Kamo river system,but the upper part consisted by River Kamiya and River Wakasa. This change means the north-west mountains uplifted and Kyoto basin was depressed rapidly. 4) Lower terrace surface group distributing along River Kamiya are classified into L1, L2 and L3 in descending order. They were formed as strath terraces during the late stage of the last glacial and the post glacial periods. L3 terrace is developed only in the narrow zone of about 400 m length in the middle course of the river. The severe deepening, in creases of wave length of meander and meander cut-offs are cleariy in the lower course of the zone. These features can be interpreted as the results of local uplifting caused by the recent activity of the Nishinoyama flexure. |
Departmental Bulletin Paper |
日本語 |
植村善博 |
UEMURA Yoshihiro |
文学部論集 |
佛教大学文学部 |
09189416 |
82 |
21 |
35 |
1998年03月02日 |
https://bukkyo.alma.exlibrisgroup.com/discovery/openurl?institution=81BU_INST&vid=81BU_INST:Services&rfr_id=info:sid%2Fsummon&rft_dat=ie%3D21286747140006201 |
https://archives.bukkyo-u.ac.jp/rp-contents/BO/0082/BO00820L021.pdf |
https://archives.bukkyo-u.ac.jp/repository/baker/rid_BO008200003676 |
公開中 |