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Shishimuta-Azuki Tephra

Abbr.: Ss-Az

Synonym: Azuki (Osaka)

• Type locality: Osaka pref.
• Tephra
• middle Pleistocene (820 ka, FT)
• Correlation: Ku6C, Yk5 (Choshi, Chiba), Kisen Tephra, Uw-14, Imaichi Pyroclastic Flow Deposit (Oita)

• Lithofacies: Vitreous volcanic ash

• Source: Shishimuta caldera, Oita pref., Japan
• Thickness: ca. 25 cm
• Host: Seika Formation, Fukakusa Formation, Ma 3, Kori Formation, Upper part of Osaka Group, Kokumoto Formation, Ogoto Clays Member

• Distribution: Osaka pref.; Boso peninsula, Chiba pref.; Shiga pref.
• Distribution: Mount Egeyama - Maruyama junior high school, Kobe city, Hyogo pref.; Koyoen - Matsugaoka - Mount Takatsukayama, Nishinomiya city, Hyogo pref.; Senri hills, Osaka pref.

• Tamura et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.1, pp.23-39 DOI
• Wakita et al. (2013) Geology of the Kyoto-Tonambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 124p. (in Japanese with English abstract 3p.)
• Hongo (2009) Jour. Geol. Soc. Japan, vol.115, no.2, pp.64-79 DOI
• Miyachi et al. (2005) Geology of the Kyoto-Seinambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 90p. (in Japanese with English abstract 4p.)
• Miyachi et al. (2001) Geology of the Osaka-Tohokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 130p. (in Japanese with English abstract 6p.)
• Ozaki et al. (2000) Geology of the Nara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 162p. (in Japanese with English abstract 5p.)
• Ishida et al. (1984) Geology of the Hikone-Seibu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 121p. (in Japanese with English abstract 6p.)
• Huzita and Kasama (1983) Geology of the Kobe District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 115p. (in Japanese with English abstract 8p.)
• Huzita and Kasama (1982) Geology of the Osaka-Seihokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 112p. (in Japanese with English abstract 8p.)