Yorihata Member

[ Top ] [ Japanese ]

Yorihata Member (Matsuda, 1961) Sugiyama and Matsuda, 2014

Type locality: Tomiei bridge, Nanbu city, Minamikoma county, Yamanashi prefecture
Volcanic rocks
late Miocene
Correlation: Shinoisan Member, Seigo Volcaniclastic Member

Sedimentary facies: Marine
Lithofacies: Andesite tuff, Tuff breccia
Lithofacies (Bottom): Felsic tuff

Thickness: 1,000 m or thicker
Lower limit: Conformity (Utsubuna Member, Hakii Interbeds of Sandstone and Mudstone Member)

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: Majino - Yorihata - Tomiei bridge, 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.)