海薄付近の変動地形と地震

概要

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Tectonic rclief in and near trenches around the Japanese Islands are described and discussed in terms of mode of tectonic deformations associated with large shallow earthquakes. Outer Ridges bordering the deep-sea terraces developed on the continental slopes are parts of uplifting during the recent geologieal times, probably Pliocene and Quaternary. Uplifts of the Outer Ridge arc interprcted to be originated from low-angle thrust faultings between the continental block and occanic one. A model of imbrication structure of the mega-thrust beneath the Outer Ridge and the landward slope of the trench is presented.
1976-03-25