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Hanegawa Formation Yanagisawa et al., 1986

• Type locality: Hane river, Uonuma city, Niigata prefecture
• Accretionary complex
• Jurassic?
• Contemporaneous heterotopic facies: Himizo Formation
• Correlation: Kenomatasawagawa Formation
• Intruded by: Andesite

• Sedimentary facies: Marine
• Lithofacies: Chert, Shale
• Lithofacies (Minor): Interbedded shale and sandstone
• Exotic blocks (Crusts): Chert, Sandstone, Sandy mudstone
• Sedimentary structures: Slump structure

• Thickness: 2,400 m
• Upper limit: Unconformity (Okura Formation)
• Lower limit: Conformity (Okuwabara Formation)

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

• Distribution: Hane river - Sanashi river - Hizuke river, Uonuma city, Niigata pref.

• Chihara and Komatsu (1992) Geology of the Hakkaisan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 107p. (in Japanese with English abstract 8p.)
• Yanagisawa et al. (1986) Geology of the Ojiya District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 177p. (in Japanese with English abstract 6p.)