抄録
Thirty main hot springs are found in the vicinity of Mine-Onsen. The area under discussion is situated along the northern part of the Kawazu River. The river valley is presumably a fault origin.
These hot springs, issued from the alluvial sand and the Tertiary Formation, are arranged along several lines running in directions of nearly NNW-SSE and WNW-ESE. The directions coincide with that of the fissures in the agglomerate, andesite tuff or liparite fuff which belongs to the Tertiary Formation.
Moreover, partaining to the hot springs near Rendaizi in the southern part of the district, their distribution are influeced by the fissures that run nearly in the same direction as those of the northern part of this district.
Next, the location of rice-field on the mounntain slope is determined by the existence of springs from which irrigation water is available. These springs are also arranged along the fissures above-mentioned.
Therefore, it is possible to say the tectonic structures are playing one of the most important rolls for the human activities of this region.
