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- 三田村 宗樹
- 大阪市立大学理学部地学教室
書誌事項
- タイトル別名
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- Stratigraphy and Geologic Structure of the Osaka Group(Pliocene and Pleistocene) in Keihanna Hills, Kinki District, Japan.
- ケイハンナ キュウリョウ ノ オオサカソウグン ノ ソウジョ ト チシツ コウ
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The stratigraphy of the Pliocene-Pleistocene Osaka Group in Keihanna Hills is summarized as follows, <br>1. The Osaka Group in this area, about 300 meters thick, is lithologically subdivided into four formations: the Tomigaoka, Tanabe, Seika and Shoudai Formations in ascending order. More than 14 volcanic ash layers and 5 marine clay beds are intercalated in these strata. Among them, 10 volcanic ash layers and 5 marine clay beds are useful as key beds. They are the Kitadani, Higashibata, Fugenji, Takagi, Susudani I, Susudani II, Pink, Azuki, Hacchoike and Kasuri volcanic ash layers, and the Ma1, Ma2, Ma5, Ma6 and Ma 8 beds, in ascending order.<br>2. On the basis of lithologic data on the volcanic ash layers and magnetostratigraphic data, the Osaka Group in this area can be correlated with the standard stratigraphy from the lower horizon of Mitsumatsu volcanic ash layer to the upper horizon of the Ma 8 bed.<br>3. This area is subdivided into three areas: the south area to the Fugenji Flexure (characterized by north-south-trending flexures and faults), the north area to the Katano Fault- Nagao Flexure (northeast-southwest-trending flexures and faults) and the area between the Katano Fault-Nagao Flexure and the Sonenji Flexure (the northern part of the Ikoma Range). These flexure and fault structures in the Osaka Group have resulted from the tilting of the basement blocks by foundation folding in the east-west compressional stress.
収録刊行物
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- 第四紀研究
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第四紀研究 31 (3), 159-177, 1992
日本第四紀学会
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詳細情報 詳細情報について
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- CRID
- 1390282681474010880
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- NII論文ID
- 130001564232
- 10003766894
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- NII書誌ID
- AN0034136X
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- ISSN
- 18818129
- 04182642
- http://id.crossref.org/issn/04182642
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- NDL書誌ID
- 3780433
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 使用不可