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Urago Formation (Ueda, 1933) Eto et al., 1998
Invalid synonym: Fukazawa Formation
- Type locality: Asahina, Kamakura city, Kanagawa prefecture
- Coherent formation
- Fore-arc basin sediments (Kazusa trough)
- Pleistocene
- Depth of water: upper - lower Sublittoral
- Lithofacies: Tuffaceous sandstone
- Lithofacies (Minor): Tuffaceous mudstone, Tuff breccia, Pumice tuff, Scoria
- Sedimentary structures: Cross stratification
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Asahina pass - Imaizumi - Fukazawa - Kajiwara - Fueta - Kitakamakura - Mount Ohirayama - Tenen - Cape Koyurugi, Kamakura city, Kanagawa pref.; Urago, Kanazawa ward, Yokohama city, Kanagawa pref.; Asahi town, Fujisawa city, Kanagawa pref.; Mutsuura, Zushi city, Kanagawa pref.; Takatori town - Oihama town, Yokosuka city, Kanagawa pref.
- Fossils: Calyptogena sp., Foraminifera, Calcareous nannofossils
- Tephra: Tn-GP
- Suzuki and Murata (2011) Jour. Geol. Soc. Japan, vol.117, no.7, pp.379-397 DOI
- Tamura et al. (2010) Jour. Geol. Soc. Japan, vol.116, no.7, pp.360-373 DOI
- Eto et al. (1998) Geology of the Yokosuka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 128p. (in Japanese with English abstract 3p.)
- Mitsunashi and Kikuchi (1982) Geology of the Yokohama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 105p. (in Japanese with English abstract 4p.)