Utsubuna Member

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Utsubuna Member Sugiyama and Matsuda, 2014

Type locality: Sakaechubu forest road, Utsubuna, Nanbu city, Minamikoma county, Yamanashi prefecture
Coherent formation
late Miocene
Correlation (Upper): Fukushi Member, Hakii Interbeds of Sandstone and Mudstone Member
Correlation: Omorozawa Member, Marutaki Conglomerate Member, Manzawa Member, Machiya Member
Intruded by: Andesite dyke, Sill

Sedimentary facies: Marine
Lithofacies: Interbedded sandstone and mudstone
Lithofacies (Minor): Conglomearte, Tuffaceous sandstone, Andesite tuff, Lapilli tuff

Upper limit: Conformity (Yorihata Member), Unconformity (Yagisawatoge Formation)

Minobu Formation (Southeast)
[ Upper ]
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Yorihata Member
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Utsubuna Member
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[ Lower ]

Fujikawa Group (Eastern zone)
[ Upper ]
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Akebono Formation
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Minobu Formation
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Shimobe Formation
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[ Lower ]

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

Distribution: Utsubuna, Nanbu city, Minamikoma county, Yamanashi pref.

Sugiyama and Matsuda (2014) Geology of the Nanbu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 134p. (in Japanese with English abstract 5p.)