フオッサ・マグナ地域内陸部の第四紀地殻運動

概要

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The middle part of the Fossa Magna exhibits a marked pattern of structure as shown in Fig. 1. A marked tectonic belt called the "Midbelt of Upheaval" runs acros this area from south to northeast, dividing it into two structural basins on the east and west. A few strike-slip faults in the left-lateral sense have been detected in the area of the Tertiary sediments in the western basin. In Early Quaternary time, the land surface was denudated to form a low configuration, followed by an extensive upheaval. In the last phase of structural development the tectonic basin such as the Matsumoto and Suwa basins were brought into existence. The structural development may have progressed, continuously since Miocenetime, dominantly under the stress field affected by the crustal compression in the E-W direction.
日本地質学会の論文