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Shakumasan Unit

Included in Youra Unit in 2010

Invalid synonym: Shakuma Group

• Accretionary complex
• Deposition (Mudstone): Middle - Late Jurassic (Radiolarians)

• Sedimentary facies: Marine
• Lithofacies: Sandstone, Sandstone-dominant interbedded sandstone and mudstone, Mudstone, Chert
• Lithofacies (Minor): Greenstones
• Sedimentary structures: Graded bedding

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

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

• Distribution: Oita pref.

• Kiminami et al., (2009) Jour. Geol. Soc. Japan, vol.115, no.11, pp.578-596 DOI