[ Top ] [ Japanese ]

Omi Complex (Hasegawa et al., 1969) Nagamori et al., 2010

Synonym (Invalid): Omi Limestone Group

• Type locality: Omi, Itoigawa city, Niigata prefecture
• Accretionary complex
• Deposition (Pelitic rocks): middle Permian (Radiolarians)
• Deposition (Siliceous mudstone): middle Permian (Radiolarians)
• Accretion: Permian

• Sedimentary facies: Marine
• Lithofacies (Upper): Limestone
• Lithofacies (Lower): Basalts (Pillow lava), Pelitic rocks, Siliceous mudstone

• Upper limit: Thrust fault
• Lower limit: Thrust fault

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

• Distribution: Omi, Itoigawa city, Niigata pref.
• Fossils: Radiolarians

• Nagamori et al. (2018) Geology of the Itoigawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 75p. (in Japanese with English abstract 3p.)
• 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.)
• Takeuchi et al. (2015) Jour. Geol. Soc. Japan, vol.121, no.7, pp.193-216, DOI
• Nagamori et al. (2010) Geology of the Kotaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 130p. (in Japanese with English abstract 4p.)
• Takeuchi et al. (2010) Jour. Geol. Soc. Japan, vol.116, Supplement, pp.123-142 DOI