Hirutadaki Tuff Member

[ Top ] [ Japanese ]

Hirutadaki Tuff Member Kasuya, 1982 ex Kitamura et al., 1983

Type locality: Hirutadaki, Fukuoka, Izumi ward, Sendai city, Miyagi prefecture
Tephra
late Miocene

Sedimentary facies: Pyroclastic flow deposit
Lithofacies: Pumice tuff

Thickness: 0 - 50 m

Shirasawa Formation
[ Upper ]
~~~~~~~~~~~~~~
Itaoroshitoge Siltstone Member
--------------
Baba Tuff Member
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Shirasakatoge Siltstone Member
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Hirutadaki Tuff Member
--------------
[ Lower ]

Akiu Group
[ Upper ]
~~~~~~~~~~~~~~
Shirasawa Formation / Mitaki Formation
--------------
Nashino Formation
~~~~~~~~~~~~~~
Yumoto Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Hirutadaki, Fukuoka, Izumi ward, Sendai city, Miyagi pref.; Okura dam, Okura, Aoba ward, Sendai city, Miyagi pref.

Kitamura et al. (1983) Geology of the Yoshioka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 50p. (in Japanese with English abstract 5p.)