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S4

• Accretionary complex
• middle - late Eocene

• Sedimentary facies: Marine
• Lithofacies: Conglomerate, Gravel-bearing mudstone, Mudstone
• Lithofacies (Minor): Mudstone, Sandstone-dominant interbedded sandstone and mudstone, Sandstone
• Sedimentary structures: Cross stratification, Trace fossils

• Thickness: ca. 100 - 360 m

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

• Distribution: Sodani valley - Hiraigawa river - Nakamura - Ui - Uruno, Kozagawa city, Higashimuro county, Wakayama pref.; Nakanohirami, Susami city, Nishimuro county, Wakayama pref.; Takogo - Tagota - Aritagawa river, Kushimoto city, Higashimuro county, Wakayama pref.
• Fossils (Shellfishes): Portlandia watasei, Venericardia sp., Yoldia saitoi

• 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.)