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Wabuka Formation

• Type locality: Nishiji - Wabuka - Mitogawa, Taiji city, Higashimuro county, Wakayama prefecture
• Accretionary complex
• middle - late Eocene

• Sedimentary facies: Marine
• Lithofacies: Mudstone, Mudstone-dominant interbedded mudstone and sandstone
• Paleocurrent: from East-northeast
• Paleocurrent (Minor): from East-southeast

• Thickness: 1,100 - 1,300 m or thicker
• Upper limit: Conformity (M1)

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

• Distribution: Mirozu - Satono, Susami city, Nishimuro county, Wakayama pref.; Wabuka, Kushimoto city, Higashimuro county, Wakayama pref.; Mitogawa river, Kozagawa city, Higashimuro county, Wakayama pref.; Nishiji, Taiji city, Higshimuro county, Wakayama pref.
• Fossils (Shellfishes): Acila shiyaensis, Acila brevis, Lucinoma nagaoi, Neilonella sp., Portlandia watasei, Solemya sp.,

• 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.)