Nt-S Tephra

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Nt-S Tephra Akutsu, 1955

Abbr.: Nt-S

Type locality: Shichihonzakura, Imaichi city, Tochigi prefecture
Tephra
by a series of volcanic activity with Nt-I
Pleistocene (13- 12 ka)

Lithofacies: Lapilli

Source: Nantai volcano
Mode of eruption: Plinian
Host: Shimotsuke-Osawa Terrace Deposit, Tawara Loam
Thickness: 30 cm or thinner

Nantai volcano
[ Upper ]
--------------
Nt-S
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Nt-I
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[ Lower ]

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

Distribution: Shichihonzakura, Imaichi city, Tochigi pref.; Omuro - Noguchi, Nikko city, Tochigi pref.; Imaichi alluvial fan, Imaichi city, Tochigi pref.; Ishinada town, Utsunomiya city, Tochigi pref.

Yoshikawa et al. (2010) Geology of the Utsunomiya District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 79p. (in Japanese with English abstract 6p.)