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Ieda Group Makiyama, 1934

• Coherent formation
• early Miocene

• Lithofacies: Interbedded shale and sandstone
• Lithofacies (Minor): Conglomerate, Tuff

• Thickness: ca. 40 m
• Upper limit: Unconformity (Dainichi Sandstone)
• Lower limit: Unconformity (Odaira Group)

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

• Distribution: Odaira - Manze - Mushu - Iwamuro, Iwata city, Shizuoka pref.
• Fossils: Plant leaf

• Saito and Isomi (1954) Akihasan, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 34p. (in Japanese with English abstract 10p.)