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Aikawa and Kotokawa Terrace Deposit

• Type locality: Aikawa terrace, Oga city, Akita prefecture
• Coherent formation
• Pleistocene
• Correlation: Irian Formation

• Sedimentary facies: Marine
• Sedimentary facies: Transgressive lag deposit
• Lithofacies: Sand

• Thickness: 2 - 3 m
• Lower limit: Unconformity (Kitaura Formation)

• Distribution: Aikawa terrace, Oga city, Akita pref.; Cape Nyudozaki - Aikawa, Oga city, Akita pref.; Funagawa - Monzen, Oga city, Akita pref.

• Kano et al. (2011) Geology of the Toga and Funakawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 127p. (in Japanese with English abstract 4p.)
• Shiraishi et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.33-50 DOI
• Fujimoto et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.51-74 DOI