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Kamiasahigaoka Pyroclastic Flow Deposit Matsui et al., 1970

Invalid synonym: Kamiasahigaoka Pumice Flow Deposit, HR-1

• Tephra
• Pleistocene (0.7, 0.51 Ma, K-Ar)

• Lithofacies: Pyroclastic flow deposit
• Lithofacies (HR-1): Glassy ash

• Thickness: 10 m or thicker
• Thickness (HR-1): 100 - 150 cm
• Upper limit: Unconformity (Ak3)
• Upper limit: Unconformity? (Tokachibuto Formation)
• Lower limit: Unconformity (Ak4)
• Lower limit: Unconformity? (Shibusan Formation, Kamishikaribetsu Pyroclastic Flow Deposit)

• Distribution: Oribe, Kamishihoro city - Osarushinai hills, Otofuke city, Kato county, Hokkaido; Meto river, Ashiyoro city, Ashiyoro county, Hokkaido
• Distribution (HR-1): Shinhororo, Tsurui city, Akan county, Hokkaido; Aishinai river, Hokkaido

• Hasegawa et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.7, pp.366-381 DOI
• Ishii et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.7, pp.348-365 DOI
• Hasegawa and Nakagawa (2007) Jour. Geol. Soc. Japan, vol.113, no.2, pp.53-72 DOI