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Yumigahama Formation

Marine clay bed at the lower level than Nakaumi Formation

There are opinions that the mud-sands-gravels bed covered with Daikonjima Basalt and Eshima Basalt is not Yumigahama Formation.

• Coherent formation
• Pleistocene

• Sedimentary facies: Marine
• Lithofacies: Clay

• Upper limit: Unconformity? (Daikonjima Basalt, Eshima Basalt)

• Distribution: Daikon island - Eshima island, Yatsuka village, Matsue city, Shimane pref.

• Sawada et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.51-70 DOI