Stratigraphy and geological structure of the Tanabe Group in the Kii Peninsula, Southwest Japan
Bibliographic Information
- Other Title
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- 紀伊半島田辺層群の層序と構造
- キイ ハントウ タナベソウグン ノ ソウジョ ト コウゾウ
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Abstract
The Tanabe Group develops in the southwestern part of the Kii Peninsula . It overlies the Otonashigawa Group(Eocene?) in the northern part and the Muro Group(Oligocene−Lowest Miocene)in the southern part with a remarkable clino−unconformity,and is overlain unconformably by the Tohshima Conglomerate Bed. The Tanabe Group is lithologically divided into two formatiolls,namely the Asso Formation and the Shirahama Formation in ascending order. The Asso Formation is subdivided into three members (A1, A2 and A3)and the Shirahama Formation into five members (S1,S2,S3,S4 and S5).The Asso Formation is composed mainly of mudstone and conglomerate. The Shirahalna Formation consists of sandstone,alternations of sandstone and mudstone,and conglolnerate.Total thickness of the group attains to more than 1,100m.The geological structure of the group is characterized by the foldlngs showing ENE−WSW trend and westward plunging,and also by E−W and N−S trending faults. The geologlc age of Member A3 of the Asso Formation is correlated to the upper part of Blow’s N8 by the yieldings of some foraminifers：Praeorbtdlina glomerosa,Pro.cf. transitoria and Globigerinoides sicanus.The Tanabe sedimentary basin is discussed and attempted to reconstruct,based on the lithology and the lateral change in thickness as well as on the preliminary study on the paleocurrents.
Journal
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- Earth Science (Chikyu Kagaku)
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Earth Science (Chikyu Kagaku) 38 (4), 249-263, 1984
The Association for the Geological Collaboration in Japan
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Details 詳細情報について
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- CRID
- 1390282679243790720
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- NII Article ID
- 110007091843
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- NII Book ID
- AN00141269
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- ISSN
- 21897212
- 03666611
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- NDL BIB ID
- 2992467
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed
