Kanaya Tuff Member

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Kanaya Tuff Member Kaneko, 1944

Invalid synonym: Nishiyachi Tuff Member

Type locality: Mount Kanayasan, Joetsu city, Niigata prefecture
Coherent formation
Rift basin sediments
Pliocene (5.4 Ma)
Correlation: Ndp Tephra, Ogp Tephra, Susobana Formation

Sedimentary facies: Marine
Sedimentary facies: Submarine sediments
Sedimentary facies: Re-worked sediments of Susobana Formation
Lithofacies: Pumice tuff

Source: Susobana Formation
Thickness: 15 - 30 m

Minakuchi Alternation of Sandstone and Mudstone Member
[ Upper ]
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Kanaya Tuff Member
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[ Lower ]

Nodani Formation
[ Upper ]
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Nakanomata Mudstone Member
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Minakuchi Alternation of Sandstone and Mudstone Member
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Yokobatake Alternation of Sandstone and Mudstone Member
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[ Lower ]

Nishikubiki Group
[ Upper ]
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Kawazume Formation
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Nodani Formation
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Nanbayama Formation
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[ Lower ]

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

Distribution: Mount Kanayasan, Joetsu city, Niigata pref.; Utsuo - Kamitsunako - Nakanomata - Nishiyachi - Higashihiyama, Joetsu city, Niigata pref.
Tephra: Kayana Tuff (Kn or KT)

Nagamori et al. (2018) Geology of the Itoigawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 75p. (in Japanese with English abstract 3p.)
Akahane and Kato (1989) Geology of the Takada-Seibu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 89p. (in Japanese with English abstract 3p.)