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Tsunozu Formation Sanin Quaternary Research Group, 1969
Invalid synonym: Oya Group, Oe Group
- Type locality: Tsunozu, Gotsu city, Shimane prefecture
- Coherent formation
- Pliocene - middle Pleistocene
- Sedimentary facies: Marine, Freshwater
- Sedimentary facies (Upper): Sand dune, Seashore
- Sedimentary facies (Middle): Fluvial
- Sedimentary facies (Lower): Seashore
- Lithofacies (Upper): Sands
- Lithofacies (Middle): Gravels
- Lithofacies (Lower): Sands, Gravels, Mud
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Tsunozu, Gotsu city, Shimane pref.; Yunotsu - Hane town - Shizuma town, Oda city, Shimane pref.; Hamada city, Shimane pref.; Oura, Oda city, Shimane pref.
- Takahashi et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.9, pp.474-492 DOI
- Kano et al. (2001) Geology of the Yunotsu and Gotsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 129p. (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.)