津波によるれき堆積物の運搬および堆積　　岩手県合足海岸の例

DOI Web Site 被引用文献4件 参考文献16件

書誌事項

タイトル別名
  • Transportation and Sedimentation of Beach and Sea-floor Gravels Caused by Tsunami: An Example at Attari Coast, Iwate Prefecture.
  • ツナミ ニ ヨル レキタイセキブツ ノ ウンパン オヨビ タイセキ イワテケンアッタリ カイガン ノ レイ
  • An Example at Attari Coast, Iwate Prefecture
  • 岩手県合足海岸の例

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抄録

Gravel beds presumably formed by the Meiji-Sanriku-Tsunami (1896) Occur immediately below a large tsunami stone at Attari Coast, Ohfunato-City, northeast Japan. The stone weights approximately 10 tons and was transported by the tsunami from a nearby sea-floor. Gravel (mostly coarse-grained slate) beneath the tsunami stone consists of either rounded beach gravel or angular breccias that pre-existed on the beach or on the sea floor (probably deeper than the upper shoreface). Granulometric analyses of the breccias show a consistent decreae of size and number toward inland, whereas there is an increasing size and number of rounded beach gravel toward the foot-hill. The facts suggest that the tsunami (flood) was transported beach gravel inland during the deposition of angular clasts from the sea-floor.

収録刊行物

  • 地学雑誌

    地学雑誌 110 (5), 689-697, 2001

    公益社団法人 東京地学協会

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