Mayumitoge Welded Tuff

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Mayumitoge Welded Tuff Yamada et al, 1971

Type locality: Mayumitoge pass, Otaki city, Kiso county, Nagano prefecture
Volcanic rocks
Caldera
Late Cretaceous - Paleogene

Lithofacies: Welded tuff

Thickness: 200 - 500 m or thicker
Upper limit: Transitional (Uguigawa Welded Tuff)

Sequence IV (central Mikkaichi, Gifu pref.)
[ Upper ]
~~~~~~~~~~~~~~
Akadani Welded Tuff
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Tsumetadani Formation
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[ Lower ]

Sequence IV (eastern Mikkaichi, Gifu pref.)
[ Upper ]
~~~~~~~~~~~~~~
Genjidake Welded Tuff
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Mikkamachi Formtion
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[ Lower ]

Sequence IV (Takayama, Gifu pref.)
[ Upper ]
~~~~~~~~~~~~~~
Kuzogawa Welded Tuff
~~~~~~~~~~~~~~
Aoya Tuff
~~~~~~~~~~~~~~
[ Lower ]

Sequence IV (Southern area)
[ Upper ]
~~~~~~~~~~~~~~
Uguigawa Welded Tuff
--------------
Mayumitoge Welded Tuff
~~~~~~~~~~~~~~
Takadaru Welded Tuff
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Atera Formation
--------------
[ Lower ]

Nohi Rhyolites
[ Upper ]
~~~~~~~~~~~~~~
Sequence VI
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Sequence V
~~~~~~~~~~~~~~
Sequence IV
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Sequence III
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Sequence II
~~~~~~~~~~~~~~
Sequence I
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Mayumitoge pass - Lake Miura, Otaki city, Kiso county, Nagano pref.

Yamada and Kobayashi (1988) Geology of the Ontakesan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 136p. (in Japanese with English abstract 9p.)
Kawada et al. (1988) Geology of the Hagiwara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 82p. (in Japanese with English abstract 10p.)
Yamada et al. (1985) Geology of the Takayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 9p.)