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Norikurazawa Lava Nakano et al., 2002

Invalid synonym: Hiyodorimine Lava, Tsugadaira Lava

• Volcanic rocks
• middle Pleistocene (0.6 - 0.55 Ma; 0.6, 0.57, 0.55 Ma, K-Ar)

• Lithofacies: Olivine orthopyroxene clinopyroxene andesite, Hypersthene augite andesite\
• Lithofacies: Andesite lava (more than 5 flow units), Tuff breccia
• Lithofacies (Minor): Sands, Gravels

• Thickness: 150 - 250 m or thicker
• Thickness (Sands, Gravels): ca. 15 m
• Upper limit: Unconformity (Ebiradake Lava)
• Lower limit: Unconformity (Hiedayama-Kabu Lava)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Tugadaira - Tsugaike - Norikurazawa creek - Hiwadaira - Furikozawa creek - Karamatsuzawa creek - Mount Fusuburiyama - Mount Hiyodorimine - Mount Amidayama, Otari city, Kitaazumi county, Nagano pref.

• Nagamori et al. (2010) Geology of the Kotaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 130p. (in Japanese with English abstract 4p.)
• Nakano et al. (2002) Geology of the Shiroumadake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 105p. (in Japanese with English abstract 5p.)