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Oharano Formation (Tamura et al., 1984) Ozaki and Sugiyama, 2018

• Type locality: Niimiyagawa river, Oharano, Hayakawa city, Minamikoma county, Yamanashi prefecture
• Coherent formation
• Miocene
• Correlation: Mogura Formation

• Sedimentary facies: Marine
• Lithofacies (Upper): Mudstone
• Lithofacies (Upper, Minor): Conglomerate
• Lithofacies (Middle): Sandstone-dominant interbedded sandstone and mudstone, Basalt - Andesite tuff breccia, Volcanic breccia, Lava
• Lithofacies (Middle, Minor): Volcanic conglomerate, Tuffaceous sandstone, Mudstone
• Lithofacies (Lower): Mudstone
• Lithofacies (Lower, Minor): Conglomerate
• Sedimentary structures: Parallel stratification, Graded bedding, Flute casts

• Thickness: 550 m or thicker
• Lower limit: Conformity (Arakura Formation)

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

• Distribution: Oharano - Hayakawa river, Hayakawa 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.)