[ Top ] [ Japanese ]

Omagari Formation

It had been included in Upper Yezo Group.

• Coherent formation
• Yezo forearc basin
• Late Cretaceous, Santonian - Campanian

• Sedimentary facies: Turbidite
• Lithofacies (Main): Interbedded sandstone and mudstone
• Lithofacies (Minor): Mudstone, Sandstone, Conglomerate

• Thickness: 550 - 810 m
• Upper limit: Conformity
• Lower limit: Conformity

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

• Distribution: Teshio-Nakagawa, Hokkaido
• Fossils: Ammonoids (Gaudryceras tenuiliratum), Bivalves (Inoceramus (Platyceramus) japonicus), Woods

• Shimada et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.6, pp.432-436 DOI