四国内帯の鮮新・洪積層について

概要

論文の詳細を見る
(1) The Tertiary system in the Inner zone of Shikoku is represented by the Pliocene Mitoyo formation, and the Pliocene Okamura formation in the sea of Hiuchi. (2) This formation is correlated with the lower part of the Osaka group, the Pliocene Akashi and Awaji formations in the Kinki Province. The horizon of Stegodon shodoensis akashiensis dredged from the sea bottom of Seto may belong to this group. (3) The distribution of this group is closely related with the T_3 level of the Pleistocene terrace deposits. (4) The Pleistocene deposits are deltaic and divided into three terraces, i. e., T_1, T_2, and T_3. (5) Igneous activities are recognized in the Pleistocene age of this province. (6) The distributions of the Tertiary formations are governed by the structure of the base rocks which represent a stepped graben structure with E-W trend. (7) The structural movement controling the present distribution of the Tertiary formations may be after the middle Pleistocene age.
東北大学の論文
1960-05-05