著者

片岡 香子 中条 武司

出版者

日本地質学会

雑誌

地質学雑誌 = 地質学雑誌 (ISSN:00167630)

巻号頁・発行日

vol.106, no.12, pp.897-900, 2000-12

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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.