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Shakusenji Formation (Nozawa and Sakamoto, 1960) Takeuchi et al., 2017

Invalid synonym: Shinmura Formation, Tojo Formation

• Type locality: Kamiichigawa river, Shakusenji, Kamiichi city, Nakaniikawa county, Toyama prefecture
• Coherent formation
• Miocene (ca. 15.7 Ma or later; 13.7 Ma, FT)
• Correlation: Higashibessho Formation

• Sedimentary facies: Siltstone
• Lithofacies (Top): Sandy mudstone
• Lithofacies: Siltstone, Sandy mudstone
• Lithofacies (Minor): Muddy sandstone, Sandstone, Tuffaceous mudstone
• Sedimentary structures: Bioturbation

• Thickness: ca. 70 - 200 m
• Upper limit: Conformity, partly unconformity (Otogawa Formation), Unconformity (Kamidaki Sandstone Member, Takabtake Formation, Muroda Formation)
• Lower limit: Conformity (Tochizu Alternation of Sandstone and Mudstone Member, Tsubono Formation)

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

• Distribution: Kamiichigawa river - Goio, Shakusenji, Kamiichi city, Nakaniikawa county, Toyama pref.; Tomari, Asahi city, Shimoniikawa county, Toyama pref; Kurobe city - Uozu city, Toyama pref.; Gohyakkoku, Tateyama city, Nakaniikawa county, Toyama pref.; Yatsuo town - Kamidaki - Shiraiwa, Toyama city, Toyama pref.; Tofukuji - Kamioura, Namerigawa city, Toyama pref.; Utsuro - Tojo - Ikedani - Kitayama - Kosuge - Hiebatake, Uozu city, Toyama pref.
• Fossils: Fish scales, Sponges (Spicules), Radiolarians, Diatoms, Plant fragments, Pipe rocks
• Fossils (Shellfishes): Acila sp., Amusium sp., Cirripedia sp., Clinocardium sp., Lucinoma sp., Macoma sp., Nuculana sp., Portlandia sp., Saccella sp.
• Fossils (Foraminifera): Bathysiphon sp., Cassidulina sp., Cibicides sp., Haplophragmoides emaciata, Robulus calcar, Robulus himiensis, Uvigerina proboscidea
• Tephra: Yamadanaka Tuff

• Takeuchi et al. (2017) Geology of the Tomari District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 121p. (in Japanese with English abstract 4p.)
• 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.)
• Nozawa and Sakamoto (1960) Gohyakkoku, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 68p. (in Japanese with English abstract 10p.)