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Nagahama Formation Uemura, 1962

• Type locality: Nagahama seashore, Sai city, Shimokita county, Aomori prefecture
• Accretionary complex
• Accretion: Jurassic?
• Intruded by: Quartz diorite, Quartz porphyry

• Lithofacies: Pelitic schist, Green schist, Phyllite, Slate, Sandstone, Basic tuff, Chert
• Lithofacies (Minor): Limestone

• Upper limit: Unconformity (Sai Formation, Kinpachizawa Formation)

• Distribution: Isotani - Chogo, Sai city, Shimokita county, Aomori pref.; Fukuura - Oyashirazu - Hantaro creek, Kawauchi town, Mutsu city, Aomori pref.

• Uemura (1975) Geology of the Mutsukawauchi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 39p. (in Japanese with English abstract 7p.)
• Uemura (1962) Oma and Sai, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 39p. (in Japanese with English abstract 6p.)