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Ayama Formation Kawabe, 1989

• Type locality: Tamataki, Iga city, Mie prefecture - Nogawa, Konan town, Koka city, Shiga prefecture
• Coherent formation
• Pliocene (3.1 - 2.8 Ma)

• Sedimentary facies: Terrestrial
• Sedimentary facies: Wide and deep lake
• Lithofacies: Clay

• Thickness: ca. 130 m
• Upper limit: Conformity (Koka Formation)
• Lower limit: Conformity (Tsuge Member)

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

• Distribution: Hananoki hills - Oyamada - Tamataki, Iga city, Mie pref.; Nogawa, Konan town, Koka city, Shiga pref.
• Tepha: Jisonji Tuff Bed (Yubune Tuff Bed), Hokke II Tuff Bed, Masugi Tuff Bed, Tamataki Tuff Bed

• Satoguchi (2015) Jour. Geol. Soc. Japan, vol.121, no.4, pp.125-139, DOI
• Wakita et al. (2013) Geology of the Kyoto-Tonambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 124p. (in Japanese with English abstract 3p.)
• 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.)