Numajiri Pyroclastic Flow Deposit

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Numajiri Pyroclastic Flow Deposit (Fujinawa, 1980)

Tephra
Pleistocene
Contemporaneous heterotopic facies: Ad-DK Tephra

Lithofacies: Pyroclastic flow deposit
Lithofacies: Augite hypersthene andesite

Volume: ca. 1.2 km³
Thickness: 30 m or thicker
Upper limit: Unconformity (Choshigataki Pyroclastic Flow Deposit, Akagidaira Lava, Otaki Lava, Shiraitonotaki Lava, Akataki Lava, Iogawa Lava, Minowasan Lava)
Lower limit: Unconformity (Yokomuki Formation)

Adatara volcano
[ Upper ]
+__+__+__+__+_
Minowasan-Adatarayama products
~~~~~~~~~~~~~~
Oshosan products
~~~~~~~~~~~~~~
Sogodai Lava
~~~~~~~~~~~~~~
Numajiri Pyroclastic Flow Deposit
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Numajiri highland, Inawashiro city, Yama county, Fukushima pref.; Ishimuro river - Mizukami river, Koriyama city, Fukushima pref.

Sakaguchi (1995) Geology of the Nihonmatsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 79p. (in Japanese with English abstract 4p.)