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Toyama Formation

• Type locality: Gifu prefecture
• Coherent formation
• First Seto Inland Sea
• Sedimentary basin in island arc
• early Miocene, Burdigalian (ca. 18 - 16 Ma)

• Sedimentary facies: Brackish, Marine

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

• Distribution: Gifu pref.
• Tephra: Ty-6, Ty-8

• Yamasaki et al. (2020) Geology of the Akechi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 120p. (in Japanese with English abstract 5p.)
• Sasao et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.8, pp.476-481 DOI