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Iga Formation (Takaya, 1963) Kawabe, 1986

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

• Coherent formation
• Pliocene (3.6 - 3.1 Ma)

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

• Thickness: 40 - 60 m
• Upper limit: Conformity (Ayama Formation)
• Lower limit: Conformity, partly Unconformity (Ueno Formation)

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

• Distribution: Hananoki hills, Iga city, Mie pref.; Oyamada 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.)
• 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.)