薩摩半島吹上浜沖陸棚斜面の特異地形

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書誌事項

タイトル別名
  • Failed submarine landslides on the shelf break, off Fukiage-hama, Satsuma peninsula, Kyushu, Japan
  • サツマ ハントウ フキアゲハマオキ リクダナ シャメン ノ トクイ チケイ

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抄録

Elongated trough-like depressions were discovered on the shelf break, southwest off the Kyushu. Each depression is 200−250 meters in width, hundreds meters to 2 kilometers in length and 10−20 meters in relative depth. The depressions are discontinuously aligned for 18 kilometers parallel to the strike of the shelf slope. The shelf and upper shelf slope consist of a deposit of the Pleistocene Ito pyroclastic flow in origin. The distribution of the depressions and geological information indicate that the depressions are not any of erosional features by tidal currents or gravitational flows, but “crown crack”, which is a kind of tensional cracks on the top of a submarine slide body during the initial stage of sliding.<br>

収録刊行物

  • 地質学雑誌

    地質学雑誌 112 (8), 531-534, 2006

    一般社団法人 日本地質学会

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