Numazawako Pyroclastic Deposit

Numazawako Pyroclastic Deposit (Takahashi and Sugawara, 1985) Yamamoto, 1995

Synonym: Numazawa-Numazawako Pyroclastic Deposit

Type locality: Mukure creek, Okuriyama, Kaneyama city, Onuma county, Fukushima prefecture
Volcanic rocks
Holocene (5.4 ka - 3,400 B.C., ¹⁴C)
Contemporaneous heterotopic facies: Numazawako Lahar Deposit

Sedimentary facies: Pyroclastic fall deposit, Pyroclastic surge deposit
Lithofacies: Clinopyroxene-bearing orthopyroxene hornblende dacite, Clinopyroxene orthopyroxene hornblende andesite
Lithofacies: Lapilli, Volcanic ash

Source: Lake Numazawa

Numazawako Pyroclastic Deposit
[ Upper ]
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Unit IV
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Unit III
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Unit II
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Unit I = Numazawa-Numazawako Pyroclastic Flow Deposit
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[ Lower ]

Numazawa volcano
[ Upper ]
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Numazawako Pyroclastic Deposit / Numazawako Lahar Deposit
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Numagozen Pyroclastic Deposit
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Maeyama Lava
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Sozan Lava
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Mizunuma Pyroclastic Deposit
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Mukurezawa Lava
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Shirifukitoge Pyroclastic Deposit / Nm-SB Tephra
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[ Lower ]

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

Distribution: Mukure creek, Okuriyama, Kaneyama city, Onuma county, Fukushima pref.

Masubuchi et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.10, pp.533-550, DOI
Masubuchi and Ishizaki (2011) Jour. Geol. Soc. Japan, vol.117, no.6, pp.357-376 DOI
Yamamoto et al. (2006) Geology of the Kitakata District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 63p. (in Japanese with English abstract 5p.)
Yamamoto and Komazawa (2004) Geology of the Miyashita District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 71p. (in Japanese with English abstract 5p.)