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Uminokuchi Pyroclastic Rocks

• Volcanic rocks
• Pleistocene
• Correlation: lower Nobeyamahara Formation

• Sedimentary facies: Low temperature pyroclastic flow deposit or mudflow deposit?
• Lithofacies: Tuff breccia, Volcanic breccia
• Lithofacies (Minor): Scoria, Wood fragments

• Thickness: 60 m
• Upper limit: Unconformity (Takaishigawa Formation)

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

• Distribution: Uminokuchi, Minamimaki city, Minamisaku county, Nagano pref.

• Kawachi (1977) Geology of the Yatsugatake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 92p. (in Japanese with English abstract 4p.)
• Kawachi (1974) Geology of the Tateshinayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 5p.)