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Paleoseismicity of the Gero fault constituting the north-central part of the Atera Fault System (2)(Summaries of Researches Using AMS)

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  • 阿寺断層系中北部,下呂断層の古地震活動時期(2)(タンデトロン加速器質量分析計業績報告2003(平成15)年度)

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The ^<14>C age of gravel layer(unit 5) in the bottom of trench wall around the Gero fault is 6335±34yr.B.P. It is likely that this age shows an age of the Event occurrd after the deposition of the gravel layer (unit 5). On the other hand, the faulting have occurred before the deposition of the humic soil layer (unit 2c, dated at 6208±40yr.B.P.) on the gravel layer(unit 5). But the age of humic gravel layer (unit 3)between 2c and 5 is 5156±41yr.B.P. Therefore, we can present only the faulting which occurred after 6335±34yr.B.P.

タンデトロン加速器質量分析計業績報告 Summaries of Researches Using AMS 2003 (平成15)年度


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