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Soga Formation
Invalid synonym: Soga Group
- Coherent formation
- Pliocene - early Pleistocene
- Sedimentary facies: Marine
- Sedimentary facies: Forearc basin (Sagara-Kakegawa Basin) deposit
- Sedimentary facies: Regression deposits
- Lithofacies (Top): Gravels
- Lithofacies (Upper): Sands
- Lithofacies (Middle, S0): Interbedded pumiceous sands and tuff
- Lithofacies (Lower): Sands
- Lithofacies (Bottom): Gravels
- Thickness: 100 m or thinner
- Thickness (Middle): 10 - 15 m
- Thickness (Lower): ca. 10 m
- Thickness (Bottom): ca. 10 m
- Upper limit: Unconformity (Ogasa Group)
- Lower limit: Unconformity (Aburayama Sand Member)
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Yusanji temple - Yamada, Fukuroi city, Shizuoka pref.
- Fossils: Foraminifera (Baggina totomiensis)
- Fossils (Shellfishes): Clementia vatheleti, Dentalium weinkauffi, Glycymeris rotunda, Macrocallista pacifica, Paphia greefei, Suchium giganteum, Suchium subsuchiense
- Tephra: S0
- Makiyama and Sakamoto (1957) Mitsuke & Kakezuka, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 43p. (in Japanese with English abstract 7p.)