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Kobe Group Shikama, 1938

Invalid synonym: Shirakawa Group

• Coherent formation
• late Eocene - early Oligocene (36.9 - 30.4 Ma, FT)
• Correlation: Kibi Group

• Sedimentary facies: Fluvial, Lacustrine, Alluvial fan
• Sedimentary facies (Minor): Shallow marine
• Sedimentary facies: Slope surrounding a lake
• Climate: Warm temperate
• Climate: Deciduous broad-leaved forest
• Lithofacies: Sandstone, Mudstone, Conglomerate
• Lithofacies (Minor): Rhyolite tuff, Lignite

• Thickness: 800 m or thicker
• Upper limit: Unconformity (Akashi Formation, Shimakumayama Member)
• Lower limit: Unconformity (Sasori Tuff Breccia, Tamba Belt)

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

• Distribution: Najio, Shiose town, Nishinomiya city, Hyogo pref.; Takedao - Kawashimogawa river, Takarazuka city, Hyogo pref.; Tamaru, Dojo town, Kobe city, Hyogo pref.; Shirakawatoge pass, Suma county, Kobe city, Hyogo pref.; Yamada - Sengari golf field, Sanda city, Hyogo pref.; Shiose town - Yamaguchi town - Minamotodaki?, Nishinomiya city, Hyogo pref.; Kasai city, Hyogo pref.; northern Awajishima island, Hyogo pref.
• Fossils (Kobe flora): Castanea miomollissiuma, Equisetum arcticum, Fagus paleocrenata, Liquidambar miosinica, Metasequoia occidentalis, Sequoia affinis, Zelkova ungeri

• Sato et al. (2022) Geology of the Wake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 106p. (in Japanese with English abstract 4p.)
• Sato et al. (2016) Geology of the Banshu-Ako District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 68p. (in Japanese with English abstract 3p.)
• Ozaki and Harayama (2003) Geology of the Takasago District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 87p. (in Japanese with English abstract 3p.)
• Ozaki et al. (1995) Geology of the Hojo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 101p. (in Japanese with English abstract 6p.)
• Matsuura et al. (1995) Geology of the Hirone District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 110p. (in Japanese with English abstract 6p.)
• Mizuno et al. (1990) Geology of the Akashi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 90p. (in Japanese with English abstract 5p.)
• Ozaki and Matsuura (1988) Geology of the Sanda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 93p. (in Japanese with English abstract 5p.)
• Huzita and Maeda (1984) Geology of the Suma District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 101p. (in Japanese with English abstract 7p.)
• Huzita and Kasama (1983) Geology of the Kobe District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 115p. (in Japanese with English abstract 8p.)
• Huzita and Kasama (1982) Geology of the Osaka-Seihokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 112p. (in Japanese with English abstract 8p.)