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Tochidani Unit (Ishida, 1987) Hara et al., 2014

Invalid synonym: Tochidani Formation, Naruse Formation, Harumori Group

• Type locality: Tochidani, Naka city, Naka county, Tokushima prefecture
• Accretionary complex
• Deposition (Mudstone): Middle Jurassic - Cretaceous, Albian - Cenomanian
• Cretaceous, Albian - Cenomanian

• Sedimentary facies: Marine
• Lithofacies: Coherent facies
• Lithofacies (Minor): Broken facies
• Lithofacies: Sandstone, Interbedded sandstone and mudstone
• Lithofacies (Minor): Felsic tuff
• Sedimentary structures: Graded bedding, Convolute stratification

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

• Distribution: Mugi city, Kaifu county, Tokushima pref.; Nagayasuguchi dam - Tochidani - Tochidanigawa river - Oriudanigawa river - Hoshigoetoge pass - Minamiu - Hiura - Hiradani - Komeno - Hodono, Naga city, Naga county, Tokushima pref.
• Fossils (Radiolarians): Archaeodictyomitra primigena, Holocryptocanium barbui, Holocryptocanium japonicum, Pseudodictyomitra carpatia, Stichocapsa cribata, Thanarla conia, Thanarla praeveneta, Thanarla pulchra, Tricolocapsa? fusiformis, Xitus spicularius, Xitus spineus, Zifondium? pauperum

• Hara et al. (2014) Geology of the Kitagawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 72p. (in Japanese with English abstract 4p.)
• Kiminami and Toda (2007) Jour. Geol. Soc. Japan, vol.113, no.4, pp.158-167 DOI