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Sanbe Base Surge Deposits Hattori et al., 1983

Invalid synonym: Oda Tephra, Kidaniike Pumice Fall Deposits, Noma Pumice Fall Deposits

• Type locality: Noma, Misato city, Ochi county, Shimane prefecture; Uyama, Sanbe town, Oda city, Shimane prefecture
• Tephra
• Pleistocene (28,840, 18,740 yBP, ¹⁴C)

• Lithofacies: Base surge deposits
• Lithofacies: Biotite rhyolite pumice, Volcanic ash
• Sedimentary structures: Antidune, Cross stratification
• Paleocurrent: from North to South, from Northwest to Southeast, from West-southwest to East-northeast

• Thickness: Some dozen m
• Upper limit: Conformity (Sanbe Pyroclastic Flow Deposits)
• Lower limit: Unconformity (Granite)

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

• Distribution: Noma, Misato city, Ochi county, Shimane pref.; Uyama, Sanbe town, Oda city, Shimane pref.; Tsunoi, Iinan city, Iishi county, Shimane pref.; Yokomi, Izumo city, Shimane pref.
• Fossils: Tree trunks

• Kano et al. (1998) Geology of the Iwami-Oda and Oura District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 118p. (in Japanese with English abstract 5p.)
• 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.)