Nagano Volcanic Ash

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Nagano Volcanic Ash Nakagawa et al., 1960

Type locality: Nagano, Zao city, Katta county, Miyagi prefecture
Volcanic rocks
Pleistocene

Lithofacies (Upper): Argillaceous tuff
Lithofacies (Lower): Volcanic sands

Thickness (Upper): 1 m or thicker
Thickness (Lower): ca. 20 cm
Lower limit: Conformity (Sendai-nakamachi Terrace Deposit)

Sendai
[ Upper ]
+--+--+--+--+-
Sendai-shimomachi Terrace Deposit
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Nagano Volcanic Ash
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Sendai-nakamachi Terrace Deposit
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Sendai-kamimachi Terrace Deposit
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Adachi-Medeshima Pumice Bed
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Dainohara Terrace Deposit
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[ Lower ]

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

Distribution: Nagano, Zao city, Katta county, Miyagi pref.; Moniwa, Sendai city, Miyagi pref.; Sugo, Murata city, Shibata county, Miyagi pref.

Miyamoto et al. (2013) Jour. Geol. Soc. Japan, vol.119, Supplement, pp.27-46 DOI
Kitamura et al. (1986) Geology of the Sendai District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 134p. (in Japanese with English abstract 9p.)