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| | Abstract | | A high resolution seismic reflection survey was conducted in the onshore area of the Echigo plain, Niigata Prefecture. The survey line is parallel to the shoreline and crosses the inferred extension of the Kakudayama toen fault. East dipping reflectors are detected between 100m and 1000m in depth with different dips in the western part of the seismic section. They are interpreted as the Nanatani formation, Teradomari formation, Nishiyama formation and so on. On the contrary, reflectors are poor in depth in the central and eastern part of the section. But deformation probably caused by fault movement are perceived on the seismic section shallower than 200m. This is a preparation of the next seismic survey which will connect onshore and offshore area. |
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