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Yonago Tuff Breccia

• Volcanic rocks
• Neogene - Pleistocene

• Lithofacies: Tuff breccia
• Lithofacies (Minor): Mudstone, Sandstone

• Thickness: 60 - 70 m
• Upper limit: Unconformity (Yonago Lava, Azumaya volcano)
• Lower limit: Unconformity (Fudodo Lava)

• Distribution: Yonago-Fudodo - Fudo fall, Suzaka city, Nagano pref.

• Ota and Katada (1955) Suzaka, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 54p. (in Japanese with English abstract 6p.)