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Higashibessho Formation

Invalid synonym: Higashi-Bessyo Formation

• Type locality: Higashibessho, Tonami city, Toyama prefecture
• Sediments in a rift zone
• Coherent formation
• Miocene (? - 15.2 Ma, Diatoms)
• Correlation: Shakusenji Formation

• Depth of water: Shallow marine - bathyal (Shellfishes)
• Depth of water (Upper): Upper bathyal (Foraminifera)
• Depth of water (Middle): Middle bathyal (Foraminifera), Inner shelf (Ostracods)
• Depth of water (Lower): Middle bathyal (Foraminifera), Outer shelf - Bathyal (Ostracods)
• Lithofacies (Upper): Turbidite sandstone
• Lithofacies: Shale, Sandstone, Siltstone, Mudstone
• Lithofacies (Minor): Tuff, Interbedded sandstone and mudstone

• Thickness: ca. 600 - 1,000 m or thicker
• Upper limit: Bottom of Tenguyama Formation
• Upper limit: Arayama Angular unconformity (Angular, Otogawa Formation), Ikahama Unconformity (Tenguyama Formation)
• Lower limit: Top of Yamadanaka Tuff
• Lower limit: Conformity (Kurosedani Formation)

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

• Distribution: Jinzu river, Yatsuo town, Toyama city - Higashibessho, Tonami city, Toyama pref.
• Fossils: Shellfishes, Foraminifera, Radiolarians, Diatoms, Ostracods

• Nakajima et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.7, pp.483-516 DOI
• Kunugiza et al. (2010) Jour. Geol. Soc. Japan, vol.116, Supplement, pp.83-101 DOI