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4th Pyroclastic Cone Deposit

• Type locality: 8th station of northeast of Mount Onamedake, Tazawako, Senboku city, Akita prefecture
• Tephra
• Pyroclastic cone
• Pleistocene - Holocene

• Lithofacies: Clinopyroxene orthopyroxene andesite
• Lithofacies: Scoria, Volcanic bomb

• Upper limit: Unconformity (Katakurazawa Lava)
• Lower limit: Unconformity (Sasamoriyama Volcanic Products, Tazawakokogen Lava)

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

• Distribution: 8th station of northeast of Mount Onamedake, Tazawako, Senboku city, Akita pref.

• Suto and Ishii (1987) Geology of the Shizukuishi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 142p. (in Japanese with English abstract 5p.)