Nomugitoge Volcanic Rocks

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Nomugitoge Volcanic Rocks

Volcanic rocks
late Pliocene (2.5 - 1.9 Ma, K-Ar)

Sedimentary facies: Caldera-fill deposit?
Sedimentary facies (Minor): Lacustrine, Fluvial, Slope-collapse deposit
Lithofacies: Andesite - Dacite lava, Intrusive rocks
Lithofacies (Minor): Tuff breccia, Lapilli tuff, Tuff, Breccia
Lithofacies (Lacustrine deposit): Sandstone, Siltstone, Conglomerate
Sedimentary structures (Lacustrine deposit): Parallel stratification, Cross stratification

Thickness: 200 m or thicker
Distribution: 5 x 3 km²

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: Nomugitoge pass - Mount Kamagamine, Nagawa, Matsumoto city, Nagano pref.

Takeuchi et al. (1998) Geology of the Kiso-Fukushima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 94p. (in Japanese with English abstract 4p.)
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.)