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Myogashima Alternation Member Tsuda, 1953

• Type locality: Muromaki river, Myogashima, Yatsuo town, Toyama city, Toyama prefecture
• Coherent formation
• early Miocene

• Lithofacies: Interbedded granitic sandstone and siltstone

• Thickness: ca. 75 - 100 m
• Upper limit: Unconformity (Iwaine Formation)
• Lower limit: Interfengered (Imozu Conglomerate Member, Ashiu Sandstone Member)

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

• Distribution: Muromaki river - Yamada river - Matsuze - Myogashima, Yatsuo town, Toyama city, Toyama pref.; Togagawa river - Wakidani - Kurito, Nanto city, Toyama pref.
• Fossils: Plants

• Nakajima et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.7, pp.483-516 DOI
• Sakamoto and Nozawa (1960) Yatsuo, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 8p.)