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Kitamatagawa Formation

• Type locality: Kitanomata river, Hachimantai city, Iwate prefecture
• Volcanic rocks
• Pliocene
• Correlation: Hashiba Formation

• Lithofacies: Tuff, Tuffaceous mudstone

• Upper limit: Unconformity (Kurasawayama Welded Tuff)

• Distribution: Kitanomata river, Hachimantai city, Iwate pref.

• Kawano and Uemura (1964) Hachimantai, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 36p. (in Japanese with English abstract 8p.)