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Shiobara-Otawara Tephra Suzuki et al., 2004

Abbr.: So-OT

Invalid synonym: Kanawasaki Pyroclastic Flow Deposit (KN-pfl)

A part of Shiobara-Shimogo Tephra Group

• Type locality: Tochigi prefecture
• Volcanic rocks
• Eruption products of a collapse caldera which formed Shiobara basin
• Pleistocene (337 - 300 ka)

• Source: Shiobara caldera
• Eruptive volume: ca. 5 km³ DRE

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

• Distribution: Tochigi pref.

• Yamada et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.10, pp.837-855 DOI