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Hirosakikobon Formation Sakai, 1960

• Type locality: Hirosaki city, Aomori prefecture
• Coherent formation
• Pleistocene

• Sedimentary facies: Lacustrine
• Lithofacies: Sands, Gravels, Clay, Sandy clay
• Lithofacies (Minor): Lignite

• Distribution: Hirosaki city, Aomori pref.
• Fossils (Plants): Menyanthes trifoliata

• Ozawa (1962) Hirosaki, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 52p. (in Japanese with English abstract 5p.)