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Uyama Base Surge Deposits Hattori et al., 1983

Invalid name: Uyama Ash Fall Deposits, Ikeda Pumice Fall Deposits

• Type locality: Uyama - Ikeda - Kori - Masugatoge pass, Sanbe town, Oda city, Shimane prefecture; Chichigi, Iinan city, Iishi county, Shimane prefecture
• Tephra
• Pleistocene

• Lithofacies: Pumice, Lithic fragments
• Lithofacies (Minor): Accretionary lapilli
• Sedimentary structures: Antidune, Cross stratification

• Thickness: ca. 30 - 35 m
• Upper limit: Unconformity (Oda Base Surge Deposits, Oda Pyroclastic Flow Deposits)
• Lower limit: Unconformity (Sanbe Pyroclastic Flow Deposits, Sanbe Ash Fall Deposits)

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

• Distribution: Uyama - Ikeda - Kori - Masugatoge pass - Oda, Sanbe town, Oda city, Shimane pref.; Chichigi - Tsunoitoge pass, Iinan city, Iishi county, Shimane pref.; Noma, Misato city, Ochi county, Shimane pref.

• 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.)