Sumikawa Lava

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Sumikawa Lava

Invalid synonym: Sumikawa Tuff

Volcanic rocks
Pleistocene - Holocene

Lithofacies (Upper): Augite hypersthene andesite lava
Lithofacies (Lower): Augite hypersthene andesite tuff, Tuff breccia, Agglomerate

Lower limit: Unconformity (Bunamoribokujo Welded Tuff)

Yakeyama volcano
[ Upper ]
+__+__+__+__+_
Onigajo Lava
~~~~~~~~~~~~~~
Tsugamori Central Cone Lava
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Kuroishimori Lava
~~~~~~~~~~~~~~
Fukenoyu Lava
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Shibukurozawa Lava
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Sorinotaki Lava
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Sumikawa Lava
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Mount Akita-Yakeyama, Kazuno city - Senboku city, Akita pref.

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.)