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Kogawa Formation

Invalid synonym: Ukekawamuro Formation

• Type locality: Maenokawa river, Tanabe city, Wakayama prefecture
• Accretionary complex
• middle - late Eocene

• Sedimentary facies: Marine
• Lithofacies: Mudstone, Sandstone
• Lithofacies (Minor): Interbedded sandstone and mudstone, Gravel-bearing mudstone
• Paleocurrent (Longitudinal current flow): from East-northeast to West-southwest
• Paleocurrent (Lateral current flow): from North, from South

• Thickness: 2,300 m
• Lower limit: Conformity (Uchikoshi Formation)

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

• Distribution: Maenokawa river - Kurisugawa river - Yomuragawa river - Otogawa river, Tanabe city, Wakayama pref.

• Tokuoka et al (1981) Geology of the Ryujin District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 6p.)
• Suzuki et al (1979) Geology of the Kurisugawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 54p. (in Japanese with English abstract 5p.)