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Daikonjima Basalt

• Volcanic activity in Shinji Rift (Half graben)
• Volcanic rocks
• Pleistocene (0.19 Ma, K-Ar)

• Sedimentary facies: Terrestrial
• Lithofacies (Minor): Scoria cone
• Lithofacies: Alkaline olivine basalt lava

• Source: Mount Otsuka
• Distribution (Scoria cone, Diamter): 200 m
• Distribution (Scoria cone, Height): ca. 20 m
• Upper limit: Unconformity? (Yasugi Formation, Nakaumi Formation)
• Lower limit: Unconformity? (Yumigahama Formation?)

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

• Sato et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.8, pp.439-450 DOI
• Sawada et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.51-70 DOI
• Kano and Yoshida (1985) Geology of the Sakaiminato District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 5p.)