北蒲原平野紫雲寺ガス田周辺における椎谷・西山階の砂岩層の発達過程について

書誌事項

タイトル別名
  • Note on sandstone development of the Shiiya-Nishiyama stages around the Shiunji gas field, Kitakanbara plain.
  • キタ カンバラ ヘイヤ シウンジ ガスデン シュウヘン ニ オケル シイヤ

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抄録

Distributions of sandstone around the Shiunji Gas Field differ significantly between the Shiiya and Nishiyama Stages, which is due to an abrupt change of basin topographies between the two stages. Sandstone in the former stage was accumulated at a deeper part of a monotonous slope-like basin by turbidites, whereas that of the latter was trapped mainly on a terrace-like basin through a well developed submarine canyon. The change of these depositonal areas, not to mention source areas, is considered to be ultimately controlled by differential movements of basement uplifts of this area.

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