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Uenohara Welded Tuff (Chihara et al., 1977) Shimazu et al., 1983

Invalid synonym: Tochikawa Welded Tuff (right bank of Nakatsu river)

• Type locality: 1,250 m above sea leve of Mount Nunoiwa - Uenohara - Tochikawa river, Sakae city, Shimominochi county, Nagano prefecture
• Tephra
• Pleistocene (1.6 Ma, FT)

• Lithofacies: Calc-alkaline
• Lithofacies: Hypersthene augite andesite welded tuff
• Lithofacies (Minor): Dacite welded tuff

• Upper limit: Unconformity (Oneyama Lavas, Takizawa Lavas, Nunoiwayama Lavas, 1st stage products)
• Thickness: 200 m
• Lower limit: Unconformity (Takayamazawa-Onizawa Pyroclastic Flow Deposit, Maekura Lavas and Pyroclastics, Ketto Formation, Akiyamago Formation, Wayama Tuff Member)

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

• Distribution: Uenohara - Mount Oiwa - Tochikawa river - Mount Nunoiwa, Sakae city, Shimominochi county, Nagano pref.

• Igarashi et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.11, pp.565-584 DOI
• Shimazu and Tateishi (1993) Geology of the Naebasan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 90p. (in Japanese with English abstract 5p.)