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Tateyama D Tephra Machida and Arai, 1992

Abbr.: Tt-D

Invalid synonym: DPm

• Tephra
• middle Pleistocene (0.13 - 0.09 Ma; 94 ka, Ionium)
• Contemporaneous heterotopic facies: Shomyodaki Pyroclastic Flow Deposit

• Host: Kamiyama Loam, Upper Tephra, Takano Formation, Akagiyama Gravel
• Thickness: 15 - 25 cm

• Distribution: Toyama pref.; Nishikawara, Itoigawa city, Niigata pref.; Kusugawa river - Matsuzawa - Oyazawa, Otari city, Kitaazumi county, Nagano pref.

• Nagamori et al. (2018) Geology of the Itoigawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 75p. (in Japanese with English abstract 3p.)
• Nagamori et al. (2010) Geology of the Kotaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 130p. (in Japanese with English abstract 4p.)
• Nakano et al. (2010) Jour. Geol. Soc. Japan, vol.116, Supplement, pp.37-48 DOI
• Nakano et al. (2002) Geology of the Shiroumadake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 105p. (in Japanese with English abstract 5p.)
• Harayama et al. (2000) Geology of the Tateyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 218p. (in Japanese with English abstract 6p.)
• Kato and Akahane (1986) Geology of the Nagano District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 120p. (in Japanese with English abstract 5p.)
• Kato (1980) Geology of the Sakaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 5p.)