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Yakuno Group

Invalid synonym: Kawanishi Group, Kawahigashi Group

• Type locality: Nukata, Yakuno town, Fukuchiyama city, Kyoto prefecture
• Coherent formation
• early - middle Triassic
• Correlation: Fukumoto Group

• Sedimentary facies: Marine
• Sedimentary facies: Delta, Continental shelf
• Lithofacies: Mudstone, Sandstone, Conglomerate
• Sedimentary structures: Upward-fining

• Distribution (Width): ca. 2.5 km
• Lower limit: Unconformity (Maizuru Group)

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

• Distribution: Nukata, Yakuno town, Fukuchiyama city, Kyoto pref.; Narahara - Gujo, Oe town, Fukuchiyama city, Kyoto pref.; Ichio - Oro - Hinoo - Joganji - Nagasu - Ominagaso, Fukuchiyama city, Kyoto pref.; Hirobatake - Okuyama, Ayabe city, Kyoto pref.; Hyogo pref.
• Fossils: Ammonoids (Ceratite-type), Bivalves (Claraia sp.)

• Suda and Hayasaka (2009) Jour. Geol. Soc. Japan, vol.115, no.6, pp.266-287 DOI
• Takemura et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.123-137 DOI
• Kobayashi (2008) Jour. Geol. Soc. Japan, vol.114, no.2, pp.80-87 DOI
• Kurimoto and Makimoto (1990) Geology of the Fukuchiyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 97p. (in Japanese with English abstract 5p.)
• Igi and Kuroda (1965) Oeyama, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 81p. (in Japanese with English abstract 12p.)