北部フォッサ・マグナ西縁部の第三系〜第四系(1) : 長野県姫川中流地域の第三系〜第四系の層序と構造

概要

論文の詳細を見る
Clastic and pyroclastic sediments of the late Miocene to the early Pleistocene age in the middle reaches of the Hime River along the western margin of the Northern Fossa Magna were studied. The important results are as follows. 1) There are two, large faults running from north to south, that is the Itoigawa-Shizuoka Tectonic Line in the west and the Otari-Nakayama Fault in the east. 2) There are also diagonal faults that run either from northeast to southwest or from northwest to southeast. They are characteristic of this area, and divide the area into several blocks. 3) The strata in these blocks are named the Minamiotari, the Hokujo, the Kawauchi and the Kinasa Formations respectively. 4) Correlation of these formations is as follows. [Table] 5) The Iwatoyama Syncline plunging to the south-southwest is made up of the Minamiotari Formation, and is regarded as the southern extension of the Buno Syncline. 6) Several pairs of anticline and syncline aretraced in the Kinasa Formation for over a few kilometers. They run from north-northeast to south-southwest.
日本地質学会の論文
1979-03-30