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Arugatoge Body

Invalid synonym: Kojinyama Pyroclastic Rocks

• Volcanic rocks
• Pleistocene

• Lithofacies: Hypersthene augite andesite - Hypersthene hornblende augite dacite lava, Pyroclastic rocks
• Lithofacies (Minor): Interbedded gravels and sands, Silt, Pumiceous tuff

• Thickness: 200 m or thicker
• Lower limit: Unconformity (Ryoke Metamorphic Rocks, Moriya Formation)

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

• Distribution: Suzuriishi - Majino pass - Aruga pass - Ueno river, Suwa city, Nagano pref.; Konota river, Tatsuno city, Kamiina county, Nagano pref.; Okaya city, Nagano pref.

• Makimoto et al. (1996) Geology of the Takato District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 6p.)