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Sakishima Formation (Otsuka, 1928) Uchino et al., 2017

Invalid synonym: Ugata Formation

• Coherent formation
• early Pleistocene (ca. 0.9 Ma)

• Sedimentary facies: Fluvial
• Sedimentary facies (Minor): Marine
• Sedimentary facies: Inner bay, Estuary
• Climate: Warm temperate
• Water temperature: Warm ocean current
• Depth of water: 30 m or shallower
• Lithofacies: Silt, Sands, Gravels
• Lithofacies (Minor): Clay

• Thickness: ca. 10 m
• Upper: Unconformity (Middle I Terrace Deposits, Middle II Terrace Deposits, Lower Terrace Deposits)
• Lower limit: Unconformity (Matoya Group)

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

• Distribution: Hasama - Erihara - Sakazaki, Isobe town, Shima city, Mie pref.; Osatsu town, Toba city, Mie pref.
• Fossils: Foraminifera, Diatoms, Trace fossils (Ophiomorpha isp.)
• Fossils (Shellfishes): Dinocardium braunsi, Mabellarca hiratai, Turritella kurosio
• Fossils (Plants): Ruppia sp., Sapium sp., Stewartia sp., Tsuga sp.
• Fossils (Pollen): Carpinus sp., Fagus sp., Picea sp., Pinus sp., Sapium sp., Styrax sp.
• Tephra: Isobe, Osatsu

• Uchino et al. (2017) Geology of the Toba District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 141p. (in Japanese with English abstract 5p.)