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Iw-W7a Tephra Ito et al., 2018

• Magmatic eruption deposit
• Holocene (5.3 - 5.0 cal ka, ¹⁴C)

• Sedimentary facies: Terrestrial
• Lithofacies: Sandy volcanic ash
• Lithofacies (Minor): Scoria

• Thickness: 8 cm

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

• Distribution: Iwate pref.

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