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Sanbe Pyroclastic Flow Deposits Hattori et al., 1983

Invalid synonm: Sanbe Pumice Flow Deposit, Oda Pumice Flow Deposit, Henbara Deposits

• Type locality: Noma, Misato city, Ochi county, Shimane prefecture; Uyama - Ikeda, Sanbe town, Oda city, Shimane prefecture; Tsunoi, Iinan city, Iishi county, Shimane prefecture
• Tephra
• Pleistocene (33 - 21.7 ka, ¹⁴C)
• Intruded by: Mud dikes

• Lithofacies: Non-welded pyroclastic flow deposits (Some flow units)
• Lithofacies: Biotite rhyolite pumice, Volcanic ash
• Lithofacies (Minor): Accretionary lapilli

• Source: Mount Sanbesan
• Thickness: ca. 70 m
• Upper limit: Conformity (Sanbe Ash Fall Deposits), Unconformity (Sanbe-Ikeda Pumice Fall Deposit, Nakaumi Formation, Upper Terrace Deposits, Uyama Base Surge Deposits)
• Lower limit: Conformity (Sanbe Base Surge Deposits), Unconformity (Granite)

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

• Distribution: Noma, Misato city, Ochi county, Shimane pref.; Uyama - Ikeda - Sanbegawa river - Kute town, Sanbe town, Oda city, Shimane pref.; Tsunoi, Iinan city, Iishi county, Shimane pref.; Isagawa river - Yokomi, Izumo city, Shimane pref.

• 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.)