Kawakurumizawa Lava

[ Top ] [ Japanese ]

Kawakurumizawa Lava Igarashi et al., 1984

Type locality: crossing point between Maguse-Torikabuto forest road and Shikumi river, Sakae city, Shimominochi county, Nagano prefecture
Volcanic rocks
Pleistocene

Sedimentary facies (Middle): Lacustrine
Lithofacies (Upper): Quartz-bearing olivine hypersthene augite andesite lava
Lithofacies (Middle): Interbedded volcanic ashes
Lithofacies (Lower): Olivine hypersthene augite andesite lava

Thickness: 80 m
Thickness (Middle): ca. 7 m
Upper limit: Unconformity (Ojiroyama Lava)
Lower limit: Unconformity (Mitsuyama Formation)

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: Maguse-Torikabuto forest road - Shikumi river - Higashinosawa creek, Sakae city, Shimominochi county, Nagano pref.
Fossils (Middle): Wood fragments

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.)