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Tsuchiurazawa volcano
Invalid synonym: Tsuchiurazawa Lava
- Volcanic rocks
- Composite stratovolcano
- middle Pleistocene (0.68 - 0.57 Ma)
- Lithofacies: Hornblende hypersthene augite andesite lava, Pyroclastic rocks
- Lithofacies (Minor): Dacite, Basalt lava, Pyroclastic rocks
- Structures (Minor): Colomnar joint
- Source: in the vicinity of Mount Kengamine
- Thickness: 50 m or thicker
- Upper limit: Unconformity (Mikasayama volcano)
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Tsuchiurazawa creek - Shiranunodani valley - Izumidani valley - Otakigawa river - Hyoedani valley - Mizoguchigawa river, Otaki city, Kiso county, Nagano pref.; Yukawa river, Kiso city, Kiso county, Nagano pref.
- Takeuchi et al. (1998) Geology of the Kiso-Fukushima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 94p. (in Japanese with English abstract 4p.)
- Yamada and Kobayashi (1988) Geology of the Ontakesan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 136p. (in Japanese with English abstract 9p.)