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Ichinosawa Unit Hara and Hisada, 1998

• Type locality: Ichinosawa, Otaki, Chichibu city, Saitama prefecture
• Accretionary complex
• Accretion: Early Cretaceous, late Albian - Late Cretaceous, Cenomanian
• Correlation (Limestone): Torinosu Group

• Sedimentary facies: Marine
• Lithofacies: Sandstone, Shale, Broken facies
• Lithofacies (Minor): Siliceous shale, Tuffaceous shale, Limestone
• Sedimentary structures: Graded bedding

• Upper limit: Thrust fault (Wanakurasawa Unit)
• Lower limit: Thrust fault (Kumotoriyama Unit)

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

• Distribution: Ichinosawa creek - Oboragawa river, Otaki, Chichibu city, Saitama pref.; Okumotoridani valley - Nippara river - Karamatsudani valley, Okutama city, Nishitama county, Tokyo

• Hara et al. (2010) Geology of the Mitsumine District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 110p. (in Japanese with English abstract 4p.)