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Iwate-Shirishida Scoria

Abbr.: Iw-SS Tephra

• Magmatic eruption deposit
• Holocene (AD 1016 - 1294, ¹⁴C)

• Sedimentary facies: Terrestrial
• Lithofacies (Upper, Iw-SS1): Scoria
• Lithofacies (Middle): Volcanic ash
• Lithofacies (Lower, Iw-SS2): Scoria

• Eruptive volume: 4.55 x 10^-3 km³ DRE
• Thickness: 10 cm or thinner

------ 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