Lower Omatsukura Lava

[ Top ] [ Japanese ]

Lower Omatsukura Lava

Volcanic rocks
Pleistocene - Holocene (2.1 Ma, K-Ar)

Lithofacies: Interbedded andesite lava and pyroclastic rocks

Omatsukura volcano
[ Upper ]
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Omatsukura Lava
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Lower Omatsukura Lava
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1162.3m-yama Lava
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[ Lower ]

Iwate volcanic group
[ East ]
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Iwate volcano
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Inukura volcano
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Omatsukura volcano
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Marumori volcano
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[ West ]

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

Distribution: Mount Omatsukura - Mount Mitsuishi, Hachimantai city, Iwate pref.

Suto and Ishii (1987) Geology of the Shizukuishi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 142p. (in Japanese with English abstract 5p.)
Kawano and Uemura (1964) Hachimantai, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 36p. (in Japanese with English abstract 8p.)