Shimonaka Sandstone Member

Shimonaka Sandstone Member (Ichihara et al., 1950) Sumi et al., 1989

Type locality: Shimonaka, Tsubta city, Kahoku county, Ishikawa prefecture
Coherent formation
middle - late Miocene

Lithofacies: Andesitic sandstone, Sandy siltstone

Thickness: ca. 10 - 200 m

Otogawa Formation (Tsubata, Ishikawa pref.)
[ Upper ]
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Tomonobori Sandy Siltstone Member
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Shimonaka Sandstone Member
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Yoshikura Mudstone Member
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Iwaodaki Tuffaceous Sandstone Member
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[ Lower ]

Tonami Group
[ Upper ]
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Mita Formation
~~~~~~~~~~~~~~
Otogawa Formation
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Tenguyama Formation
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[ Lower ]

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

Distribution: Shimonaka - Otaniuchi - Takebashi, Tsubta city, Kahoku county, Ishikawa pref.; Dotsubono, Oyabe city, Toyama pref.
Fossils: Sharks (Carcharodon megalodon)
Fossils (Shellfishes): Chlamys sp., Clinocardium sp., Conchocele sp., Dentalium yokoyamai, Dosinia cfr. kanehara, Felaniella usta, Lucinoma acutilineatum, Macoma optiva, Mya sp., Neptune sp., Nuculana sp., Panope sp., Saccella kongiensis, Soletellina sp., Turritella sp.

Sumi et al. (1989) Geology of the Isurugi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 118p. (in Japanese with English abstract 5p.)
Sumi (1978) Geology of the Tsubata District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 55p. (in Japanese with English abstract 4p.)
Inoue et al. (1964) Johana, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 32p. (in Japanese with English abstract 5p.)