マス・ムーブメントの地質学的考察  [in Japanese] Mass Movement in the Light of Geology  [in Japanese]

Mass movement, like the most geological phenomena, has a dual nature consisting of both material science and historical one. Such a duality is well reflected on the geological "locality" of the area where the mass movement occurs. This "locality" is substantially shown by the sequences, phases and stages of development process of the mass movement. In this paper, such a point of view is proposed and discussed especially with reference to landslides, for example, the conformity of the sequences of land-slides with the type of the late Cenozoic Crustal movement, and the relationship between the particular lithological combination and large-scale older landslides. Problems of prediction and prevention of mass movement as a natural disaster should be considered from this viewpoint. Disaster must be prevented finally, but mass movement itself has a possibility to be utilized for engineering work, land reformation, and so on in the future.