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Iga Formation (Takaya, 1963) Kawabe, 1986

Invalid synonym: Iga-Aburahi Formation, Iga Sands and Gravels Member

• Type locality: Iga - Oyamada, Iga city, Mie prefecture
• Coherent formation
• Pliocene (3.6 - 3.1 Ma)

• Sedimentary facies: Terrestrial
• Lithofacies: Sands, Gravels
• Lithofacies (Minor): Silt, Clay

• Thickness: ca. 40 - 170 m
• Upper limit: Conformity (Wada Member)
• Lower limit: Conformity (Tomono Member, Nakamura Member), Unconformity (Yono Member)

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

• Distribution: Hananoki hills - Oyamada - Shimagahara - Ayama - Mount Reizan, Iga city, Mie pref.
• Fossils: Stegodon miensis
• Tepha: Shichihongi Tuff Bed, Aita Tuff Bed

• Satoguchi (2015) Jour. Geol. Soc. Japan, vol.121, no.4, pp.125-139, DOI
• Satoguchi et al. (2012) Jour. Geol. Soc. Japan, vol.118, Supplement, pp.70-78 DOI
• Nakano et al. (2003) Geology of the Minakuchi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 83p. (in Japanese with English abstract 3p.)
• Yoshida et al. (2003) Geology of the Omi-Hachiman District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 72p. (in Japanese with English abstract 3p.)
• Kimura et al. (1998) Geology of the Kyoto-Tohokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 89p. (in Japanese with English abstract 5p.)
• Kawabe et al. (1996) Geology of the Ueno District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 99p. (in Japanese with English abstract 5p.)
• Yoshida et al. (1995) Geology of the Tsu-Seibu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 136p. (in Japanese with English abstract 6p.)
• Ishida et al. (1984) Geology of the Hikone-Seibu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 121p. (in Japanese with English abstract 6p.)