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Makibara Pyroclastic Flow Deposit Tsukui, 1984

Makibara Pyroclastic Flow Deposit Arakawa, 1984

• Type locality: Nakamakibara, Daisen city, Saihaku county, Tottori prefecture
• Volcanic rocks
• middle Pleistocene (41.6 ka cal yBP, ¹⁴C)
• Contemporaneous heterotopic facies: Kamogaoka Tephra

• Sedimentary facies: Pyroclastic flow deposit
• Lithofacies: Biotite-bearing orthopyroxene-hornblende dacite
• Lithofacies: Block-and-ash flow deposit
• Sedimentary structures: Unclear lamination, Reversed graded bedding

• Source: Covered with Misen Lava Dome
• Eruptive volume: 0.19 km³ DRE
• Thickness: ca. 5 - 20 m
• Upper limit: Conformity (Eolian deposit intercalating AT tephra), Unconformity (Volcanic Fan III Deposit, Volcanic Fan IV Deposit, Masumizuhara Pyroclastic Flow Deposits)
• Lower limit: Conformity (Eolian deposit intercalating SK)

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

• Distribution: Nakamakibra - Sadagawa river - Shojingawa river - Akamatsu, Daisen city, Saihaku county, Tottori pref.; Kanayadani - Uehara - Seiyamagawa river - Okuragawa river, Hoki city, Saihaku county, Tottori pref.

• Kano et al. (2025) Geology of the Yonago District (2nd Ed.), Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 84p. (in Japanese with English abstract 4p.)
• Yamamoto (2017) Bull. Geol. Surv. Japan, vol.68, no.1, pp.1-16 DOI
• Sawada et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.51-70 DOI