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So Tephra

Abbr.: So

• Type locality: Moroiso, Misaki town, Miura city, Kanagawa prefecture
• Tephra
• Pliocene (5.1 Ma, FT; 6.0 Ma, K-Ar)

• Lithofacies: Crystalline volcanic ash
• Sedimentary structures: Prallel stratification, Graded bedding

• Thickness: 3 - 4 m
• Host: Aburatsubo Pyroclastic Rock Member

• Distribution: Moroiso - Jogashima, Miura city, Kanagawa pref.; Arasaki, Nagai, Yokosuka city, Kanagawa pref.

• Mori and Ogawa (2019) Jour. Geol. Soc. Japan, vol.125, no.10, pp.737-757 DOI
• Eto et al. (1998) Geology of the Yokosuka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 128p. (in Japanese with English abstract 3p.)
• Kodama et al. (1980) Geology of the Misaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 38p. (in Japanese with English abstract 3p.)