Nishinokawahontani Composite Mass

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Nishinokawahontani Composite Mass

Volcanic rocks
late Pliocene (2.50 Ma, K-Ar)
Intruded by: Andeiste dike

Lithofacies: Dacite - Granite porphyry intrusive rocks, Dacite lava, Tuff breccia

Nomugitoge Volcanic Rocks
[ Upper ]
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Onagadani Pyroclastic Rocks
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Tochiborazawa Andesite
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Kamagaminejobu Andesite
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Kamagaminekabu Dacite
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Akatazawa Dacite
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Bokujokita Andesite
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Nishinokawahontani Composite Mass
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[ Lower ]

Jizotoge Volcanic Rocks
[ North ]
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Nomugitoge Volcanic Rocks
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Nishino Body
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Okumine Body
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Jizotoge Body
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Saichigo Body
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[ South ]

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

Distribution: Nishinokawahontani valley, Kaidakogen, Kiso city, Kiso county, Nagano pref.; Akatazawa creek, Nagawa, Matsumoto city, Nagano pref.; Hiwadagawa river, Takane town, Takayama city, Gifu pref.

Nakano et al. (1995) Geology of the Norikuradake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 139p. (in Japanese with English abstract 4p.)