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Hinoshima Formation (Tashiro et al., 1986), Kojo et al., 2011

Invalid synonym: I Formation, II Formation, Lower half of III Formation

• Type locality: north of Hinoshima island, Ryugadake village, Kamiamakusa city, Kumamoto prefecture
• Coherent formation
• Late Cretaceous, Santonian - Campanian (Inoceramus sp.)

• Sedimentary facies: Marine, Fluvial
• Sedimentary facies (Upper): Continental shelf slope, Channel, Leeve
• Sedimentary facies (Lower): Bay, Esturay
• Sedimentary facies (Bottom): Fluvial
• Lithofacies (Top): Tuff
• Lithofacies (Upper, Main): Interbedded sandstone and mudstone
• Lithofacies (Upper, Minor): Sandstone, Sandstone-dominant interbedded sandstone and mudstone
• Lithofacies (Middle, Main): Mudstone
• Lithofacies (Middle, Minor): Sandstone
• Lithofacies (Lower, Main): Sandy mudstone, Siltstone, Mudstone
• Lithofacies (Lower, Minor): Gravel-bearing mudstone, Sandstone
• Lithofacies (Bottom): Interbedded conglomerate, gravelly sandstone and sandstone
• Sedimentary structures (Lower): Cross stratification, Parallel stratification, Convolute lamination, Slump structures

• Thickness (Type locality): 710 m
• Thickness: 710 - 870 m
• Lower limit: Unconformity (Higo metamorphic rocks, Goshoura Group)

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

• Distribution: Hinoshima island, Yugatake village, Kamiamakusa city, Kumamoto pref.; Maejima island - Nakajima island - Seshima island, Matsushima village, Kamiamakusa city, Kumamoto pref.
• Fossils (Upper): Crinoids, Radiolarians, Foraminifera
• Fossils (Upper, Bivalves): Crassostrea sp., Glycymeris amakusensis, Miltha amakusensis, Nucula amanoi, Parvamussium yubarense, Pseudopema sp., Inoceramus amakusensis, Inoceramus ezoensis, Inoceramus higoensis, Sphenoceramus naumanni, Sphenoceramus nagaoi,
• Fossils (Upper, Ammonoids): Texanites sp., Protexanites fukazawai, Gaudryceras tenuiliratum, Polyptychoceras sp., Menuites sp.
• Fossils (Middle): Foraminifera, Radiolarians
• Fossils (Lower): Foraminifera, Radiolarians

• Kojo et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.7, pp.398-416 DOI