Nagahara Lava

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Nagahara Lava (Yagi and Yagi, 1958) Hayatsu, 1972

Type locality: Daiichi power plant - Daini power plant, Torii river, Shinano city, Kamiminochi county, Nagano prefecture
Volcanic rocks
Stratovolcano
Pleistocene

Lithofacies: Lava (A flow unit)

Distribution: ca. 6 km²
Thickness: 5 - 50 m
Upper limit: Unconformity (Kh-Od Tephra)
Lower limit: Unconformity (Tenguiwa Lava)

Stratovolcano stage
[ Upper ]
~~~~~~~~~~~~~~
Karasawa Lava
~~~~~~~~~~~~~~
Chosui Lava
~~~~~~~~~~~~~~
Mikaerisaka Lava
~~~~~~~~~~~~~~
Nagahara Lava
~~~~~~~~~~~~~~
Ushibuseyama Lava
~~~~~~~~~~~~~~
[ Lower ]

3rd stage
[ Upper ]
~~~~~~~~~~~~~~
Central cone stage
~~~~~~~~~~~~~~
Caldera stage
~~~~~~~~~~~~~~
Stratovolcano stage
~~~~~~~~~~~~~~
[ Lower ]

Kurohime volcano
[ Upper ]
~~~~~~~~~~~~~~
3rd stage
~~~~~~~~~~~~~~
2nd stage
~~~~~~~~~~~~~~
1st stage
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Torii river, Shinano city, Kamiminochi county, Nagano pref.

Nagamori et al. (2003) Geology of the Togakushi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 109p. (in Japanese with English abstract 3p.)