Kenashi volcano

[ Top ] [ Japanese ]

Kenashi volcano

Volcanic rocks
early Pleistocene (ca. 1.7 - 1.0 Ma, K-Ar)

Lithofacies: Low alkaline tholeiite
Lithofacies: Andesite lava

Distribution (East-West): ca. 15 km
Distribution (South-North): ca. 20 km
Lower limit: Unconformity (Mizuho Volcanic Rocks)

Kenashi volcano
[ Upper ]
--------------
Kenashiyama volcano
~~~~~~~~~~~~~~
Western basal volcanic rocks / Mizuo-Oiriyama volcano
~~~~~~~~~~~~~~
[ Lower ]

Kenashi volcano
[ Upper ]
~~~~~~~~~~~~~~
Hakkenzan Lava
~~~~~~~~~~~~~~
Ojiroyama Lava
~~~~~~~~~~~~~~
Kawakurumizawa Lava
~~~~~~~~~~~~~~
Oirizawa Lava
~~~~~~~~~~~~~~
Tsubono Pyroclastic Rocks
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Nagano pref.

Yanagisawa et al. (2000) Geology of the Iiyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 144p. (in Japanese with English abstract 6p.)
Shimazu and Tateishi (1993) Geology of the Naebasan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 90p. (in Japanese with English abstract 5p.)