山形盆地と外縁山地の形成

• 山野井 徹

  山形大学理学部地球環境学科

書誌事項

タイトル別名

• Formation of the Yamagata Basin and Its Circumferential Mountains
• ヤマガタ ボンチ ト ガイエン サンチ ノ ケイセイ

抄録

On the formation of the Yamagata Basin and its circumferential mountains, the geological structure of the basin and the erosion system of the mountainside have been studied separately. In the present study, they are examined as connected by common tectonic movement. Tectonic movement in this region originates in compressive stress from the Pacific plate since 10Ma. The compressive tectonic movement is divided into “primary compressive movement”, which slowly caused deformation over a long period, and “second compressive movement” which caused rapid shortening after the middle Pleistocene. The Yamagata Basin changed to a new sedimentary field and formed thick sediments with this second compressive movement. On the other hand, a big collapse occurred in the volcanic mountains, and many rapid erosion phenomena like landslides scraped off the non-volcanic mountains. This erosions caused by the second compressive movement was called “neoerosion”. The topography observed at present is a product of this neoerosion.

収録刊行物

• 第四紀研究

  第四紀研究 44 (4), 247-261, 2005

  日本第四紀学会

キーワード

• 山形盆地
• 短縮変形
• 第一期圧縮変動
• 第二期圧縮変動
• 地すべり
• 侵食相
• ネオエロージョン

詳細情報

• CRID: 1390001206496667264
• NII論文ID: 10019035052
• NII書誌ID: AN0034136X
• DOI: 10.4116/jaqua.44.247
• ISSN: 18818129
• ISSN: 04182642
• NDL書誌ID: 7453831
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7453831
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可