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Oura Formation

There are opinions that this formation belongs to Maizuru Belt or Akiyoshi Belt

• Accretionary complex
• Deposition: Permian
• Intruded by: Maizuru Granite, Miyazu Granite, Dolerite, Gabbro, Granite porphyry dyke, Granophyre dyke

• Sedimentary facies: Marine
• Lithofacies: Interbedded slate and sandstone, Shale
• Lithofacies (Minor): Chert, Greenstones

• Thickness: 700 - 3,000 m or thicker
• Upper limit: Unconformity (Uchiura Group)

• Distribution: Sabaka - Tai - Cape Kanagamisaki - Yuragawa river - Nagatani - Toshima island, Maizuru city, Kyoto pref.; Odauchi - Kamiishiura, Miyazu city, Kyoto pref.; Nashima island, Takahama city, Oi county, Fukui pref.

• Igi et al. (1961) Maizuru, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 49p. (in Japanese with English abstract 9p.)
• Hirokawa and Kuroda (1960) Miyazu, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 23p. (in Japanese with English abstract 6p.)
• Hirokawa and Kuroda (1958) Tangoyura, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 23p. (in Japanese with English abstract 9p.)
• Hirokawa and Kuroda (1957) Nokogirizaki, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 22p. (in Japanese with English abstract 9p.)