抄録
The petrological and sedimentalogical studies of the Neogene rocks developed in and around the basins in Akita, Yamagata and Niigata Prefectures have been carried out. As for the Shionegawa and the Harukigawa routes in the Shinjo Basin in Yamagata Prefecture, as mentioned previously, there were observed some differences in the distribution of the non-hydrocarbon constituents both in the case of the pyroclastic rocks and in the fine clastic sediments.
Some physical and chemical studies concerning the Miocene deposits, so-called black shale and hard shale, have been also undertaken for the purpose of investigation the sedimentary petrology of those resource-rocks of petroleum and the discussions are dealt with in this present paper.
Further, it is suggested that their occurence affords important criteria for the interpretation of the complex pheomena related with the sedimentation and volcanisms during deposition of the Neogene sediments developed in the oil fields of Japan.
