The Ayashi-Okubushi Monocline, accompanied by an active thrust zone including the Ayashi Fault, western Sendai, northeast Japan

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  • OSOZAWA Soichi
    Institute of Geology and Paleontology, Graduate School of Science, Tohoku University

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  • 仙台市西部,愛子断層を含む活スラスト帯を伴う愛子-奥武士撓曲
  • センダイシ セイブ アヤシ ダンソウ オ フクム カツスラストタイ オ トモナウ アヤシ オクブシ トウキョク

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Abstract

Observation of outcrops of the Ayashi-Okubushi Monocline, western Sendai, indicates that the monocline is closely associated with thrusts. These thrusts also cut the Quaternary terrace deposits. Among these thrusts, the largest thrust is the north-northeast trending Ayashi Fault, known as an active fault. The thrust geometry indicates N-S and NW-SE compressions in late Quaternary time. The Ayashi-Okubushi Monocline crosscuts the older Kagitori-Ayashi Monocline.

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