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Nenbazawa Formation Sumi et al., 1962

Synonym: Nembazawa Formaiton

A part of this formaiton was separated as Tatematazawa Formation.

• Type locality: Nenba creek, Okawame river, Odate city, Akita prefecture
• Inland basin fill deposit
• Coherent formation
• Pleistocene

• Sedimentary facies: Lacustrine
• Lithofacies: Siltstone, Mudstone, Sandstone
• Lithofacies (Minor): Conglomerate, Volcaniclastic rocks

• Thickness: 0 - 25 m
• Upper limit: Interfingered (Older stratovolcano and Main body of Tashirodake volcano, lower part of Daira-Komagatake volcano)
• Lower limit: Unconformity

• Distribution: surrounding Mount Tashiro and Mount Daira-Komagatake
• Distribution: Nenba creek, Okawame river, Odate city, Akita pref.; Tatemata creek, Fujikoto river, Fujisato city, Yamamoto county, Akita pref.

• Sumi et al. (1962) Dairakozan, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 51p. (in Japanese with English abstract 7p.)