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Ofuku Member (Ishida et al., 1954) Waita et al., 2013

Invalid synonym: Sekinotsu Gravels Member

Same sediments as Sonoha Conglomerate Member

• Type locality: Ofuku, Ujitawara city, Tsuzuki county, Kyoto prefecture
• Coherent formation
• Pliocene - Pleistocene
• Correlation: Shigaraki Gravels Member, Kitamata Gravel Member, Sonoha Conglomerate Member

• Sedimentary facies: Fluvial, Lacustrine
• Paleo-river system: Ofuku - Inuuchitoge pass - Wazuka town
• Lithofacies: Gravels
• Lithofacies (Minor): Sands, Silt, Clay, Lignite
• Sedimentary structures: Upward fining, Imbricate structure
• Paleocurrent: from North to South

• Thickness: ca. 4 - 60 m or thicker
• Upper limit: Conformity (Otonoyama Formation), Unconformity (Tomigaoka Formation)
• Lower limit: Unconformity (Okuyamada Formation, Granitoids, Tamba Belt)

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

• Distribution: Ofuku - Okuyamada - Yuyadani, Ujitawara city, Tsuzuki county, Kyoto pref., Wazuka city, Soraku county, Kyoto pref.; Kamo town - Kita - Kizutoge pass, Kizugawa city, Kyoto pref.; Tobichi, Kasagi city, Soraku county, Kyoto pref.; Sekinotsu, Otsu city, Shiga pref.; Ryumon - Odawara, Oishi, Otsu city, Shiga pref.; Sagawaryo town, Nara city, Nara pref.

• 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.)
• Ozaki et al. (2000) Geology of the Nara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 162p. (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.)