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Shonai Sand Dunes

• Coherent formation
• Holocene

• Sedimentary facies: Terrestrial, Coastal sand dunes

• Thickness: 10 - 50 m or thicker
• Distribution (Length): ca. 32 km
• Distribution (Width): 1.5 - 2.5 km
• Lower limit: Unconformity (Backmarsh deposits)

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

• Distribution: Tsuruoka city - Sakata city -Yuza city, Yamagata Saitama pref.; Araigama, Kisakata town, Nikaho city, Akita pref.

• Yamanoi et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.12, pp.637-652, DOI
• Nakano and Tsuchiya (1992) Geology of the Chokaisan and Fukura District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 138p. (in Japanese with English abstract 7p.)