[ Top ] [ Japanese ]

Norikuradake Lava Sakuyama, 1980

• Volcanic rocks
• Pleistocene (0.2 - 0.15 Ma; 0.17 Ma, K-Ar)

• Lithofacies: Biotite quartz olivine hypersthene augite hornblende andesite
• Lithofacies: Lava (more than 2 flow units)
• Lithofacies (Minor): Volcanic breccia

• Source: in the vicinity of Mount Norikuradake
• Thickness: 300 m or thicker
• Thickness (Volcanic breccia): ca. 50 m

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

• Distribution: Mount Norikuradake - Yamanokami - Mount Fusuburiyama - Norikurazawa creek - Lake Hakubaoike, 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.)