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Gamo Formation Yokoyama et al., 1968

• Coherent formation
• Pliocene - Pleistocene (2.6 - 1.8 Ma)

• Sedimentary facies: Terrestrial
• Sedimentary facies: Marshes, Lakes, Ponds
• Lithofacies: Sands-dominant interbedded sands and mud
• Lithofacies (Minor): Mud, Gravels

• Thickness: 280 - 480 m
• Upper limit: Conformity (Kusatsu Formation)
• Lower limit: Conformity (Koka Formation, Sayama Formation)

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

• Distribution: Yokaichi hills - Hino hills - Minakuchi hills - Seta hills, Shiga pref.
• Distribution: Yasu river, Konan city, Shiga pref.
• Fossils: Stegodon aurorae, Deers (Cervidae)
• Fossils (Shellfishes): Cuneopsis gamoensis, Kobiwakodonta nakajimai, Tulotomoides japonicus
• Fossils (Plants): Glyptostrobus pensilis, Juglans megacinerea, Liquidambar formosana, Menyanthes trifoliata, Metasequoia disticha, Pseudolarix kaempferi

• 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.)
• Harayama et al. (1989) Geology of the Gozaishoyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 145p. (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.)