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Oyasawa Complex Nakano et al., 2002

• Type locality: Oyasawa creek, Otari city, Kitaazumi county, Nagano prefecture
• Accretionary complex
• Permian
• Correlation: Himekawa Formation

• Sedimentary facies: Marine
• Lithofacies: Slate
• Lithofacies (Minor): Tuffaceous slate, Sandstone

• Distribution: Oyasawa creek, Otari city, Kitaazumi county, Nagano pref.; Kusunokigawa river - Akakurazawa creek, Hakuba city, Kitaazumi county, Nagano pref.

• Nakano et al. (2002) Geology of the Shiroumadake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 105p. (in Japanese with English abstract 5p.)