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Shimobe Formation (Matsuda and Mizuno, 1955) Ozaki and Sugiyama, 2018

Invalid synonym: Amegochigawa Formation

• Type locality: Shimobe - Tokiwa - Uenotaira - Hadakajima, Minobu city, Minamikoma county, Yamanashi prefecture
• Coherent formation
• late Miocene
• Contemporaneous heterotopic facies: lower Hara Formation
• Correlation: Kuonji Formation
• Intruded by: Shimobe Intrusive Rocks, Shishinsan Intrusive Rocks

• Sedimentary facies: Marine
• Depth of water: Lower bathyal

• Thickness: ca. 600 - 1,600 m
• Upper limit: Top of the pyroclastic rock bed
• Upper limit: Conformity (Yagisawa Mudstone Member)
• Lower limit: Conformity (Byobuiwa Tuff Member)

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

• Distribution: Shimobe - Tokiwa - Uenotaira - Hadakajima - Onuta - Tsubakizori, Minobu city, Minamikoma county, Yamanashi pref.

• Ozaki and Sugiyama (2018) Geology of the Minobu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 169p. (in Japanese with English abstract 7p.)
• Sugiyama and Matsuda (2014) Geology of the Nanbu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 134p. (in Japanese with English abstract 5p.)