Kumakubo Member

[ Top ] [ Japanese ]

Kumakubo Member Yoshino, 1982

Type locality: Kumakubo, Suwa city, Nagano prefecture
Volcanic rocks
middle Miocene

Lithofacies: Andesite lava, Volcaniclastic rocks

Thickness: 300 - 500 m
Upper limit: Conformity (Karasawagawa Member), Unconformity (Enrei Volcanic Rocks)
Lower limit: Interfingered (Takabe Member, Ushiroyama Member)

Moriya Formation
[ Upper ]
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Karasawagawa Member
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Kumakubo Member
'''''''/,,,,,,
Takabe Member
'''''''/,,,,,,
Ushiroyama Member
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Tanashigawa Member
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Furuyashiki Member
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Usuzawa Member
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[ Lower ]

Chushin Group
[ Upper ]
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Bessho Formation
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Uchimura Formation
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Moriya Formation
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[ Lower ]

northern Nagano pref.
[ Upper ]
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Hokushin Group
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Chushin Group
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[ Lower ]

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

Distribution: Kumakubo - Jinguji - Mount Moriyayama - Ushiroyama, Suwa city, Nagano pref.; Mount Oizumiyama, Chino city, Nagano pref.

Makimoto et al. (1996) Geology of the Takato District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 6p.)