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Nenokuchi Lacustrine Formation Nakagawa et al., 1972

Invalid synonym: Nenokuchi Formation

• Type locality: Goryo fall, Oirase river, Towada city, Aomori prefecture
• Underwater lava dome
• Coherent formation
• Pleistocene (1.0 - 0.7 Ma?)
• Contemporaneous heterotopic facies: Oirasegawa Pyroclastic Rock

• Sedimentary facies: Lacustrine
• Lithofacies: Sands, Silt
• Sedimentary structures: Cross stratification

• Thickness: 40 - 50 m
• Upper limit: Unconformity (Hakkoda 1st-stage Pyroclastic Flow Deposit)

• Distribution: Oirase river, Towada city, Aomori pref.; Osegawa river, Towada city, Aomori pref.

• Takarada and Muraoka (2004) Geology of the Hakkoda San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 86p. (in Japanese with English abstract 4p.)