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Furukakjma Sandstone Member Imamura et al., 1951

• Type locality: Furukakuma, Uozu city, Toyama prefecture
• Coherent formation
• Miocene
• Interfingered: Orido Tuff Member

• Sedimentary facies: Shallow marine
• Lithofacies (Upper): Sandstone, Muddy sandstone
• Lithofacies (Lower): Conglomerate, Gravel-bearing sandstone

• Thickness: ca. 60 - 90 m
• Thickness (Lower): 10 - 30 m
• Lower limit: Unconformity (Matsukura Tuff Breccia Member, Futomiyama Group)

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

• Distribution: Furukakuma - Matsukura - Okuhirasawa - Hirasawa - Kurodani - Fusentan - Kasuga, Uozu city, Toyama pref.
• Fossils (Lower): Balanus sp.
• Fossils (Upper, Shellfishes): Acila submirabilis, Anadara sp., Boreotrophon sp., Cylichna sp., Dentalium (Fissidentalium) sp., Limopsis sp., Lucina sp., Nassarius sp., Nemocardium sp., Nuculana sp., Olivella sp., Ostrea sp., Placopecten sp., Rotalia tochigiensis, Sliqua sp., Turritella kadonosawaensis var. ikuridaniensis, Vaginulina otukai, Venerupis (Siratoria) siratoriensis
• Fossils (Lower, Shellfishes): Glycymeris sp., Ostrea (Crassostrea) sp., Pecten arakawai

• Sumi and Nozawa (1973) Geology of the Uozu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 104p. (in Japanese with English abstract 5p.)