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Nunobiki Formation

Synonym (Upper): Nunobiki Formation II

Synonym (Lower): Nunobiki Formation I

• Type locality (Lower): Nunobiki Kannon temple, Okubo, Komoro city - Innai, Saku city, Nagano prefecture
• Coherent formation
• Inland basin-fill deposit
• Pleistocene

• Sedimentary facies (Lower): Mudflow deposit
• Lithofacies (Upper): Tuff breccia
• Lithofacies (Upper, Minor): Gravels, Sands, Mud
• Lithofacies (Lower): Pyroxene andesite volcanic breccia
• Lithofacies (Lower, Minor): Hypersthene augite lava, Tuff breccia, Lapilli tuff, Pumice tuff, Scoria tuff, Tuff, Sands, Mud

• Thickness (Upper): 60 m
• Thickness (Lower): 120 m
• Upper limit: Conformity (Uryuzaka Formation)
• Lower limit: Conformity (Okui Formation)

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

• Distribution: Nunobiki Kannon temple, Okubo, Komoro city, Nagano pref.; Innai, Saku city, Nagano pref.

• Kawachi and Aramaki (1979) Geology of the Komoro District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 39p. (in Japanese with English abstract 2p.)