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Ogasa Group

Invalid synonym: Ogasayama Conglomerate

• Type locality: Ogasayama hills, Kakegawa city - Fukuroi city, Shizuoka prefecture
• Coherent formation
• early - middle Pleistocene
• Correlation (Upper): Oshika Gravel Bed
• Correlation (Lower): Kunozan Gravel Bed

• Sedimentary facies: Marine
• Sedimentary facies (Minor): Freshwater
• Sedimentary facies: Submarine fan delta
• Sedimentary facies (Lower): Submarine channel-fill deposit
• Lithofacies: Gravels
• Lithofacies (Minor): Sands, Silt, Silt (Freshwater)

• Thickness: 400 m or thicker

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Ogasayama hills, Kakegawa city - Fukuroi city, Shizuoka pref.

• Sugiyama and Shimokawa (1990) Geology of the Shimizu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 103p. (in Japanese with English abstract 8p.)
• Sugiyama et al. (1988) Geology of the Omaezaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 153p. (in Japanese with English abstract 6p.)