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鮮新・更新統東海層群中の恵比須峠ー福田テフラ(嘉例川火山灰)における土石流 : ハイパーコンセントレイティッド流堆積物の堆積過程 鮮新・更新統東海層群中の恵比須峠ー福田テフラ(嘉例川火山灰)における土石流 : ハイパーコンセントレイティッド流堆積物の堆積過程 Depositional processes of the debris-flow and hyperconcentrated flow deposits, the Ebisutoge-Fukuda tephra (Karegawa volcanic ash) in the Tokai Group, Plio-Pleistocene boundary, central Japan 片岡, 香子 中条, 武司 hyperconcentrated flow deposit debrisflow deposit reworked volcaniclastics Ebisutoge-Fukuda tephra Hyperconcentrated flow deposit, in the Ebisutoge-Fukuda tephra from Mie Prefecture, is thought to be deposited from dilution of the debris flow. Debris-flow deposit (facies A) is overlain by hyperconcentrated flow deposit (facies B). Typical hyperconcentrated flow deposit (facies B1；horizontal bedding Part) changes upward into diluted hyperconcentrated flow deposit (facies B2； scour and fill structure part). These facies characteristics indicate that the debris flow changed through hyperconcentrated flow into normal streamflow by dilution during flow traveling. 日本地質学会 2000-12 jpn journal article http://hdl.handle.net/10191/17814 https://niigata-u.repo.nii.ac.jp/records/3221 AN00141768 00167630 地質学雑誌 地質学雑誌 106 12 897 900 https://niigata-u.repo.nii.ac.jp/record/3221/files/ZC_106(12)_897-900.pdf application/pdf 785.5 kB 2019-07-30