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Mizukamidani Formation (Kobayashi et al., 1957) Takeuchi et al., 2015

• Type locality: Middle reaches of Sakai river - Mizukami valley, Asahi city, Toyama prefecture
• Coherent formation
• Early Cretaceous, Aptian (123 - 109 Ma, U-Pb)

• Lithofacies (Upper, Main): Mudstone
• Lithofacies (Upper, Minor): Conglomerate, Sandstone, Tuff
• Lithofacies (Middle): Mudstone, Sandstone, Conglomerate
• Lithofacies (Lower): Tuffaceous mudstone, Tuffaceous sandstone, Sandstone, Conglomerate
• Sedimentary structures: Cross-stratification

• Thickness: 580 m
• Upper limit: Conformity
• Lower limit: Unconformity (Otakidani Formation)

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

• Distribution: Sakai river - Mizukami valley - Otaki valley - Shina valley, Asahi city, Toyama pref.

• Takeuchi et al. (2015) Jour. Geol. Soc. Japan, vol.121, no.7, pp.193-216, DOI
• Takeuchi et al. (2015) Jour. Geol. Soc. Japan, vol.121, no.1, pp.1-17 DOI