Abstract
At First fan-scarp and eye-brow fault is mentioned and as examples are stated, the eye-brow fault on the alluvial fan, which developed near Niiha-ma, Ehime Pref in Sikoku at the foot of the fault scarp of the Isiduti Moun twins, and topography of Graben, shifted river-pattern and flexured alluvial cone between the Tertiary low hill and fault scarp of Mt. Hisigatake south of Sibata in Niigata Pref.
Next the fault on the western slope of Yugawara Volcano, which is situated to the south of Hakone in the northern part of Idu Peninsula, is described.
Here the western slope of volcanic cone is gently declined towards west under the Kano-gawa alluvial plain, and the surface is depressed on the half way down the slope to the Tasiro basin, which is caused by meridional thrust fault of Tanna according to Mr. Y. Otuka. On the eastern side of this fault the slope is also cut by parallel faults, which trending from north-west to southeast. On the result of investigation of spur and valley form, series of fault-sags, and reflacted meridional crest line it is perceived that the northeastern block is displaced horizontally besides vertically, towards north-west against the south-western block of the fault. These fault may be perhaps displaced by the shearing stress, the force of which has acted from south to north.
Explanation of figures
Fig. 14 represent the topography of this region (1:50000) and the distribution of faults. The other cuts are tabulated as follow:
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