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Ar-I Tephra Mizuno et al., 1987

Abbr.: Ar-I

• Type locality: Arigaya - Shinogaya, Omaezaki city, Shizuoka prefecture
• Tephra
• Pliocene - early Pleistocene (3.2 Ma, FT)

• Lithofacies: Volcanic ash

• Host: Horinouchi Alternation
• Thickness: ca. 1 - 2 m

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

• Distribution: Arigaya - Shinogaya - Kadoya, Omaezaki city, Shizuoka pref.; Kawakami - Kikukawa city, Shizuoka pref.

• Sugiyama et al. (1988) Geology of the Omaezaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 153p. (in Japanese with English abstract 6p.)