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Hakkaisan Conglomerate Member

• Coherent formation
• Miocene

• Lithofacies (Upper): Conglomerate
• Lithofacies (Minor): Volcanic conglomerate
• Lithofacies (Minor): Siltstone, Sandstone

• Thickness (Upper): 20 - 300 m
• Thickness (Lower): 30 - 150 m
• Upper limit: Conformity (Kinjosan Volcanic Conglomerate Member)
• Lower limit: Unconformity (Okura Andesite Member, Sakadoyama Sandstone and Shale Member)

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

• Distribution: Mount Hakkaisan - Mount Kinjosan - Shiozawa - Mount Owariyama, Minamiuonuma city, Niigata pref.

• Chihara and Komatsu (1992) Geology of the Hakkaisan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 107p. (in Japanese with English abstract 8p.)
• Yanagisawa et al. (1985) Geology of the Tokamachi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 104p. (in Japanese with English abstract 6p.)