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Tatsubadani Lava

• Volcanic rocks
• Pleistocene
• Intruded by: Dyke

• Lithofacies: Pyroxene andesite agglomerate, Scoria agglomerate
• Lithofacies (Minor): Lava (more than 20 flow units)

• Thickness: 300 m
• Thickness (A unit): 0.3 - 10 m
• Upper limit: Unconformity (Shinkyojisan Lava, Minotonakayama Lava)
• Lower limit: Unconformity (Minoto Lava, Hirogawarazawa Lava)

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

• Distribution: Tatsubadani valley, Fujimi city, Suwa county, Nagano pref.; Kitazawa - Minamizawa, Yanagawa, Chino city, Nagano pref.; Jigokudani valley - Akadakezawa creek, Hokuto city, Yamanashi pref.

• Kawachi (1977) Geology of the Yatsugatake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 92p. (in Japanese with English abstract 4p.)