[ Top ] [ Japanese ]

Motoyama Pyroclastic Flow Deposit Fujinawa, 1980

• Tephra
• Pleistocene (0.1 Ma, FT)

• Lithofacies: Calc-alkaline
• Lithofacies: Augite hypersthene andesite
• Lithofacies: Pyroclastic flow deposit

• Thickness: ca. 20 m
• Upper limit: Unconformity (Shojigaiwa Lava)
• Lower limit: Unconformity (Shiraitonotaki Lava, Akataki Lava)

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

• Distribution: Upper reaches of Shiraito fall, Io river, Inawashiro city, Yama county, Fukushima pref.

• Sakaguchi (1995) Geology of the Nihonmatsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 79p. (in Japanese with English abstract 4p.)