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Hs1 Unit

• Coherent formation
• southern Yezo Forearc basin (Jobanoki basin)
• middle Miocene (13.5 - 13.1 Ma)

• Sedimentary facies: Marine
• Sedimentary facies: Shelf - Upper continental slope
• Sedimentary facies: Submarine channel-fill deposit, Submarine slump scar-fill deposit
• Lithofacies (Upper): Conglomerate
• Lithofacies (Lower): Diatomaceous mudstone

• Thickness (Upper): ca. 11 m
• Thickness (Lower): ca. 1.8 m

• Lower limit: Unconformity (Misawa Formation)

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

• Distribution: Hisanohama bay, Hisanohama village, Iwaki city, Fukushima pref.

• Ando et al. (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.49-67 DOI