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Taroyama Andesite Kato et al., 1989

• Type locality: Mount Taroyama, Omachi city, Nagano prefecture
• Volcanic rocks
• Pliocene (2.0 Ma, K-Ar)
• Intruded in: Wachiba Member

• Sedimentary facies (a part): Feeder dyke
• Lithofacies: Pyroxene anesite - Basaltic andesite lava
• Lithofacies (Minor): Scoria agglomerate, Tuff breccia

• Thickness: 150 m or thicker
• Thickness (Dyke, Width): 10 - 20 m
• Upper limit: Unconformity (Oshio Pyroclastic Flow Deposit)
• Lower limit: Unconformity (Wachiba Member)

• Distribution: Mount Taroyama - Mount Gongenyama - Ikenotaira, Omachi city, Nagano pref.; Shionokawa river - Hinata, Miasa, Omachi city, Nagano pref.; Iimori - Hokujo, Hakuba city, Kitaazumi county, Nagano pref.

• Kato et al. (1989) Geology of the Omachi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 7p.)