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Ryori Formation

Invalid synonym: Ozaki Formation

• Type locality: Uchigoshi - Tahama, Ryori, Sanriku town, Ofunato city, Iwate prefecture
• Volcnic rocks
• Contact metamorphism by Goyosan Pluton
• Deposition: Early Cretaceous
• Metamorphism: Early Cretaceous
• Intruded by: Goyosan Pluton (Gabbroic rocks, Yoshihama type)

• Sedimentary facies: Marine
• Lithofacies: Andesite tuff, Lapilli tuff, Lava, Sandstone, Shale, Felsic tuff, Conglomerate
• Lithofacies (Minor): Andesite tuff breccia

• Thickness: ca. 3,000 m
• Upper limit: Conformity (Takonoura Formation)
• Lower limit: Conformity (Attari Formation)

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

• Distribution: Uchigoshi - Tahama - Kujukumagari, Ryori, Sanriku town, Ofunato city, Iwate pref.; Cape Ozaki, Akasaki town, Ofunato city, Iwate pref.

• Nishioka and Yoshikawa (2004) Geology of the Ryori District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 49p. (in Japanese with English abstract 3p.)