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Iw-ph7 Tephra

Invalid synonym: PHD 5, PHD 6, Ojigokudani Tuff 1

• Phreatic eruption deposit
• Holocene (4.5 - 4.0 cal ka, ¹⁴C)

• Sedimentary facies: Terrestrial
• Lithofacies: Argilliceous volcanic ash

• Source: Amihari Motoyu spring
• Eruptive volume: 2.3 x 10⁷ m³ DRE

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

• Distribution: Mount Inukura - east of Mount Yakushidake, Mount Iwate, Iwate pref.

• Itoh et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.4, pp.271-296 DOI