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Tenryu Gravel Bed

Invalid name: upper Tenryu Group

• Coherent formation
• Pleistocene

• Sedimentary facies: Fluvial
• Sedimentary facies: Terrace deposits, Alluvial fan deposits
• Lithofacies: Gravels

• Thickness: 7 - 30 m
• Lower limit: Unconformity (Ina Formation, Ichida Granite)

• Distribution: Tenryugawa river - Nakadagirigawa river, Komagane city, Nagano pref.; Yotagirigawa river, Iijima city, Kamiina county, Nagano pref.

• Kawata and Yamada (1957) Iida, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 50p. (in Japanese with English abstract 12p.)
• Murayama and Katada (1957) Akaho, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 45p. (in Japanese with English abstract 6p.)