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Awazu Formation Masatani, 1950
- Type locality: 210.8 m triangulation station, west of Awazu, Soma city, Fukushima prefecture
- Coherent formation
- Middle Jurassic, Bajocian - Bathonian (Ammonoids)
- Intruded by (Conglomerate): Porphyry
- Sedimentary facies: Marine
- Sedimentary facies: Offshore, Inland bay
- Lithofacies (Upper): Sandy shale
- Lithofacies (Lower): Sandstone
- Lithofacies (Bottom): Conglomerate
- Sedimentary structures: Bioturbation
- Thickness: ca. 150 - 280 m
- Upper limit: Bottom of calcareous limestone with bioturbation
- Upper limit: Conformity (Yamagami Formation)
- Lower limit: Unconformity (Karosan Formation)
- Distribution: Yamakami - Ono - Hatsuno - Awazu, Soma city, Fukushima pref.
- Fossils (Ammonoids): Bigotites sp.
- Fossils (Bivalves): Chlamys awazuensis, Latitrigonia pyramidalis, Trigonids, Vaugonia awazuensis
- Taketani and Osozawa (2013) Jour. Geol. Soc. Japan, vol.119, Supplement, pp.68-81 DOI
- Yanagisawa et al. (1996) Geology of the Somanakamura District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 9p.)
- Fujita et al. (1988) Geology of the Kakuda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 99p. (in Japanese with English abstract 9p.)