2024-03-29T09:06:26Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00028157
2022-12-15T03:58:00Z
453:456
503:836:1555:1576
Mass movement in the eastern margin of the cenozoic Niigata sedimentary basin, central Japan : its geohistorical backgrounds
Mass movement in the eastern margin of the cenozoic Niigata sedimentary basin, central Japan : its geohistorical backgrounds
Takahama, Nobuyuki
The geohistorical investigation has been made on the two different kinds of large-scale mass movements in the eastern marginal region of the Niigata Sedimentary basin, i.e., the Gozu debris flows and the Aburuma-gawa landslides. The stratigraphic successions of these mass movement deposits show the following important characteristics common to the both. 1) These mass movements have occurred repeatedly at nearly the same sites since the Middle Pleistocene to the present. 2) During Middle Pleistocene and early Late Pleistocene time, the large-scale debris flows and the primary landslide occurred almost contemporaneously with the development of the mountain topography. The origin and development of these mass movements have been strongly controlled by the crustal movements since Middle Pleistocene time. The amount of upheaval of the Gozu Mountains in this period have reached about 1,000 m in maximum height. The rapid block upheaval of the Gozu Mountains and the Uonuma Hills with an increasing elevation had brought about the fracturing and collapse associated with faulting and successive erosive rejuvenation, and finally resulted in generation of the large-scale mass movements. The sea level lowering and periglacial process in the glacial epoch are not essential for the origin of mass movement in the region studied.
新潟大学積雪地域災害研究センター
1986-01
eng
departmental bulletin paper
http://hdl.handle.net/10191/39062
https://niigata-u.repo.nii.ac.jp/records/28157
AN00183327
03877892
新潟大学積雪地域災害研究センター研究年報
新潟大学積雪地域災害研究センター研究年報
7
7
72
https://niigata-u.repo.nii.ac.jp/record/28157/files/7_7-72.pdf
application/pdf
5.3 MB
2019-08-20