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Shomyodaki Pyroclastic Flow Deposit

• Volcanic rocks
• Pleistocene (0.13 - 0.12 Ma)
• Contemporaneous heterotopic facies: Tt-D Tephra

• Lithofacies (Upper): Hornblende hypersthene augite anesite scoriaceous flow deposits
• Lithofacies (Lower): Hypersthene augite biotite hornblende dacite pumice flow deposits

• Thickness: ca. 3 - 450 m
• Upper limit: Unconformity (Ninodan Lava, Matsuotoge Lava, Kunimidake Lava, Gravel Bed I, Midagahara Mudflow Deposit)
• Lower limit: Unconformity (Mizutani Lava, Upper Washidake Lava, Nakanodani Lava)

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

• Distribution: Goshikigahara - Omi - Joganjigawa river - Ichinotani valley - Shishigahanaiwa, Toyama city, Toyama pref.; Shomyodaki fall - Raichozawa creek - Bijodaira - Murodonokkoshi - Onigajodani valley - Somendaki fall - Midagahara - Gadata - Jodosawa creek, Tateyama city, Nakaniikawa county, Toyama pref.

• Nakano et al. (2010) Jour. Geol. Soc. Japan, vol.116, Supplement, pp.37-48 DOI
• Harayama et al. (2000) Geology of the Tateyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 218p. (in Japanese with English abstract 6p.)