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Shimotsuyu Formation

• Type locality: Shimotsuyu - Nishikawa, Kozagawa city, Higashimuro county, Wakayama prefecture
• Accretionary complex
• middle - late Eocene

• Sedimentary facies: Marine
• Lithofacies: Mudstone, Interbedded mudstone and sandstone, Sandstone, Conglomerate, Gravel-bearing sandstone

• Thickness: ca. 1,400 - 3,000 m
• Lower limit: Conformity (Mitogawa Formation)

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

• Distribution: Shimotsuyu - Nishikawa - Shichikawa river - Hiraigawa river - Soinogawa river - Fukuidani valley, Kozagawa city, Higashimuro county, Wakayama pref.; Samotogawa river - Shishimetoge pass, Susami city, Higashimuro county, Wakayama pref.; Kogawa river, Nachikatsuura city, Higashimuro county, 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.)
• Tateishi et al. (1979) Geology of the Esumi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 65p. (in Japanese with English abstract 6p.)