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Iw-W8a Tephra Ito et al., 2018

• Magmatic eruption deposit
• Holocene (6.9 - 6.7 cal ka, ¹⁴C)

• Sedimentary facies: Terrestrial
• Lithofacies: Scoria

• Thickness: 5 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