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Older Fan Deposits

• Coherent formation
• Pleistocene
• Correlation: Middle I Terrace Deposits, Middle II Terrace Deposits

• Sedimentary facies: Alluvial fan deposits
• Sedimentary facies: Debris flow deposits
• Lithofacies: Gravels, Sands

• Thickness: 4 m or thicker
• Upper limit: Unconformity (DMP, SK)
• Lower limit: Unconformity (Omori Formation)

• Distribution: Oda, Taki town, Izumo city, Shimane pref.; Oda, Oda city, Shimane pref.; Kanenari - Higashiayo, Unnan city, Shimane pref.

• Matsuura et al. (2005) Geology of the Kisuki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 72p. (in Japanese with English abstract 5p.)
• Kano et al. (1998) Geology of the Iwami-Oda and Oura District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 118p. (in Japanese with English abstract 5p.)
• Kano et al. (1994) Geology of the Matsue District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 126p. (in Japanese with English abstract 5p.)
• Kano et al. (1991) Geology of the Imaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 79p. (in Japanese with English abstract 5p.)