Sanbe Pyroclastic Flow Deposits

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Sanbe Pyroclastic Flow Deposits

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

Tephra
Pleistocene (30, 22 ka)

Lithofacies: Pyroclastic flow deposits
Lithofacies: Biotite rhyolite pumice, Volcanic ash

Source: Mount Sanbesan
Upper limit: Unconformity (Sanbe-Ikeda Pumice Fall Deposit, Nakaumi Formation)

Shimane pref.
[ Upper ]
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Sanbe Fall Deposits
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Sanbe Pyroclastic Flow Deposits
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Sanbe Base Surge Deposits
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[ Lower ]

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

Distribution: Sanbegawa river - Kute town, Oda city, 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.)