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Yamasaki Formation (Kobe and Hirokawa, 1963) Ishiga, 1986

Invalid synonym: Tatsuno Group, Mikazuki Formation, Middle Formation of Nakagaichi Formation, lower Shingu Formation

UT-1 Sub-belt, partly UT-2 Sub-belt

• Accretionary complex
• Permian?
• Correlation: Hikami Formation

• Sedimentary facies: Marine
• Lithofacies: Sandstone, Shale
• Lithofacies (Minor): Chert, Greenstones
• Sedimentary structures: Foliation

• Thickness: ca. 1,000 - 2,000 m or thicker
• Upper limit: Thrust fault (Tatsuno Formation), Unconformity (Seppikosan Formation, Okawachi Formation, Nagusayama Formation, Mineyama Formation)

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

• Distribution: Yamasaki town - Sayo town - Ichinomiya town, Shiso city, Hyogo pref.; Tatsuno city - Aioi city, Hyogo pref.; Yasutomi town - Yumesaki town, Himeji city, Hyogo pref.; Okawachi, Kamikawa city, Kanzaki county, Hyogo pref.

• Takemura et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.123-137 DOI
• Kobayashi (2008) Jour. Geol. Soc. Japan, vol.114, no.2, pp.80-87 DOI
• Yamamoto et al. (2002) Geology of the Yamasaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 48p. (in Japanese with English abstract 4p.)
• Kambe and Hirokawa (1963) Sayo, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 29p. (in Japanese with English abstract 8p.)