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Osaka Group Research Group for Osaka Group, 1951
- Sedimentary facies: Fluvial, Lacustrine
- Sedimentary facies (Upper, Minor): Marine
- Lithofacies: Sands, Gravels
- Lithofacies (Minor): Clay
- Thickness: 200 - 2,000 m or thicker
- Upper limit: Unconformity (Higher I Terrace Deposits, Middle Terrace Deposits, Narazaka Gravel Bed, Lower Terrace Deposits, Older Shinodayama Gravel Bed, Younger Shinodayama Gravel Bed, Kishiwada Formation, Fuchu Formation)
- Lower limit: Unconformity (Izumi Group, Arima Group, Kobe Group, Nose Pluton, Katano Granite, Taike Granite, Mikasa Andesite, Jogashiro Formation, Toyoda Formation, Jigokudani Formation, Konoyama Granite, Kawai Mylonite, W10 Unit, Kannabi Formation, Kogigawa Granite, Nabeyama Andesite)
- Osaka Group (Itami, Hyogo pref.)
- [ Upper ]
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- Itami Formation
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- [ Lower ]
- Osaka Group (Nishinomiya, Hyogo pref.)
- [ Upper ]
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- Manchidani Formation
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- [ Lower ]
- Osaka Group
- [ Upper ]
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- Ma 10
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- Ma 9
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- Ma 8
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- Ma 7
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- Ma 6
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- Ma 5
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- Ma 4
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- Ma 3
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- Ma 2
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- Ma 1.7
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- Ma 1.5
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- Ma 1.3
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- Ma 1
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- Ma 0.5
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- Ma 0
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- Ma -1
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- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Keihanna - Osaka - Akashi - Himeji
- Distribution: Senri hills, Osaka pref.; Misaki park, Misaki city, Sennan county, Osaka pref.; Mount Shimakumayama, Toyonaka city, Osaka pref.; Nara city, Nara pref.; Monryugawa river, Kurodasho town, Nishiwaki city, Hyogo pref.; Inagawa town, Kawabe county, Hyogo pref.; Kawanishi city, Hyogo pref.; Ikeda city, Hyogo pref.; Minoo city, Hyogo pref.; Egeyama town - Yumeno town - Nishidai - Sumiyoshigawa river - Ota town, Kobe city, Hyogo pref.
- Fossils (Plants): Abies sp., Canninghamia konishii, Chamaecyparis sp., Magnolia kobus, Metasequoia disticha, Picea koribai, Pinus parviflora, Pseudotsuga cf. subrotunda, Pterocarya paliurus, Sciadopithys verticillata, Styrax cf. microcarpa, Thuja sp., Tsuga sp.
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- Miyata et al. (2012) Jour. Geol. Soc. Japan, vol.118, Supplement, pp.37-52 DOI
- Hongo (2009) Jour. Geol. Soc. Japan, vol.115, no.2, pp.64-79 DOI
- Miyachi et al. (2005) Geology of the Kyoto-Seinambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 90p. (in Japanese with English abstract 4p.)
- Makimoto et al. (2004) Geology of the Kokawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 89p. (in Japanese with English abstract 4p.)
- Nishioka et al. (2001) Geology of the Sakurai District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 141p. (in Japanese with English abstract 5p.)
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- Ozaki et al. (2000) Geology of the Nara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 162p. (in Japanese with English abstract 5p.)
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- 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.)
- Miyata et al. (1993) Geology of the Wakayama and Ozaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 68p. (in Japanese with English abstract 4p.)
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- 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.)
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