Nijo Dacite

[ Top ] [ Japanese ]

Nijo Dacite

Type locality: Nijo, Minamiizu city, Kamo county, Shizuoka prefecture
Volcanic rocks
Late Miocene - Pliocene
Contemporaneous heterotopic facies: Ishiki Formation

Lithofacies: Hornblende dacite, Hypersthene augite dacite, Augite-bearing hornblende dacite
Lithofacies: Lava
Lithofacies (Minor): Volcanic breccia, Tuff breccia

Thickness: 160 m or thicker
Upper limit: Local unconformity
Lower limit: Interfingered

Shirahama Group (Southern Izu)
[ Upper ]
?--?--?--?--?-
Yoshida Andesite
~~~~~~~-------
Ishiki Formation / Nijo Dacite
'''''''/,,,,,,
Irozaki Andesite
~~~~~~~-------
Nakagi Formation
~~~~~~~~~~~~~~
[ Lower ]

Shirahama Group (Cape Irozaki)
[ Upper ]
?--?--?--?--?-
Ogamo Rhyolite
--------------
Aoichi Basalts
--------------
Ichijo Andesite
--------------
Ishiki Formation / Nijo Dacite
'''''''/,,,,,,
Irozaki Andesite
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Nijo - Kamiono - Aoichi, Minamiizu city, Kamo county, Shizuoka pref.

Kano and Ito (2016) Jour. Geol. Soc. Japan, vol.122, no.8, pp.413-432, DOI
Sumi (1958) Mikomotojima, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 33p. (in Japanese with English abstract 6p.)