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Shiobara-Tanohara Pyroclastic Flow Deposit b Yamada et al., 2018

Abbr.: So-TN b

• Type locality: Katamata, Yaita city, Tochigi prefecture
• Volcanic rocks
• Eruption products of a collapse caldera which formed Shiobara basin
• Pleistocene

• Lithofacies: Scoriaceous Flow Deposit, Pumice Flow Deposit
• Lithofacies: Poorly sorted matrix-supported scoriaceous volcanic lapilli tuff

• Source: Shiobara caldera
• Thickness (Tanohara): 10 m or thicker
• Thickness (Katamata): 200 cm
• Upper limit: Minor unconformity (Shiobara-Tanohara Pyroclastic Flow Deposit c)
• Lower limit: Conformity (Shiobara-Tanohara Pyroclastic Flow Deposit a)

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

• Distribution: Katamata - Tanohara, Yaita city, Tochigi pref.

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