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Sanbe Pumice Fall Deposits (Geological Map of Hiroshima Prefecture and Explanatory Text, 1964) Hattori et al., 1983

Invalid synonym: Sambe-Ukinuno Tephra, Sambe-Ukinuno Pyroclastic Flow Deposits

• Type locality: Lake Ukinuno - Meotomatsu - Tsunoitoge pass, Sanbe village, Oda city, Shimane prefecture
• Tephra
• Pleistocene (16,000 - 14,700 BP, ¹⁴C)
• Correlation: Sakate Tephra

• Lithofacies (Upper): Lapilli fall deposits, Ash fall deposits
• Lithofacies (Lower): Pumice fall deposits (Many fall units)

• Source: Sanbe volcano
• Thickness: ca. 1 - 5.5 m
• Upper limit: Unconformity (4th stage)
• Lower limit: Unconformity (Upper Terrace Deposits, Oda Base Surge Deposits, Oda Pyroclastic Flow Deposits, Azumayama Gravel Bed, Miinohara Gravel Bed)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Lake Ukinuno - Meotomatsu - Tsunoitoge pass, Ikeda, Sanbe village, Oda city, Shimane pref.

• Nakamura et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.9, pp.495-507 DOI
• Hattori et al. (1983) Geology of the Sambesan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 168p. (in Japanese with English abstract 7p.)
• Igi and Sakamoto (1977) Geology of the Tari District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 45p. (in Japanese with English abstract 7p.)