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Yumesaki Formation (Kishida and Wadatsumi, 1967) Yamamoto et al., 2000
- Type locality: Tsubokawa river, Otsubo - Kocho, Yumesaki town, Himeji city, Hyogo prefecture
- Volcanic rocks
- Late Cretaceous (65.7 Ma, FT)
- Intruded by: Yamada Body, Diorite, Andesite
- Sedimentary facies: Large scale caldera-fill deposit
- Lithofacies: Dacite pyroclastic flow deposit
- Lithofacies: Welded lapilli tuff, Tuff breccia
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Goji - Otsubo - Kocho - Shiota - Shinokubi - Yamada, Himeji city, Hyogo pref.
- Yamamoto et al. (2002) Geology of the Yamasaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 48p. (in Japanese with English abstract 4p.)
- Yamamoto et al. (2000) Geology of the Tatsuno District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 66p. (in Japanese with English abstract 5p.)
- Igi and Wadatsumi (1980) Geology of the Kamigori District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 74p. (in Japanese with English abstract 4p.)