Reconsideration of Marine horizon on KD-0 deep drilling in the southern of the Kyoto Basin

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  • 京都盆地南部で掘削されたKD-0コアの海成層層序の再検討
  • キョウト ボンチ ナンブ デ クッサク サレタ KD 0 コア ノ カイセイソウ ソウジョ ノ サイケントウ

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Abstract

The stratigraphy of the Quaternary sediments around the Kyoto Basin was made by correlations of the marine clay marker bed and the characteristic volcanic ash layer. Pleistocene sediments in the southern part of the Kyoto Basin are mainly consisted the Osaka Group and Pleistocene terrace deposits. The marine clay marker beds of the Osaka Group in this area are already founded twelve marine clay marker beds (Ma0, Ma1, Ma2, Ma3, Ma4, Ma5, Ma6, Ma7, Ma8, Ma9 and Ma10 beds). However the marine clay maker beds of the KD-0 deep drilling are only founded three marine clay marker beds (Ma3, Ma5 and Ma6 beds) of the Osaka Group. This paper represents the stratigraphy of KD-0 deep drilling is summarized as follows. The marine clay maker beds of the KD-0 deep drilling are newly founded eleven beds (Ma0, Ma0.5, Ma1, Ma1.3, Ma2, Ma4, Ma7, Ma8, Ma9, Ma10 and Ma12 beds). The discovery of Ma10 and Ma12 bed in the southern part of the Kyoto Basin is important on considering of Pleistocene terrace deposits sequence in the Kyoto basin and the northeastern part of the Osaka plain.

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