Irozaki Andesite

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Irozaki Andesite

Invalid synonym: Irozaki Tuff Breccia Formation

Type locality: Cape Irozaki - Nakagi, Minamiizu city, Kamo county, Shizuoka prefecture
Volcanic rocks
Late Miocene
Correlation: Suzaki Andesite

Sedimentary facies: Marine, Products of submarine volcanoes
Lithofacies: Andesite, Hyaloclastite
Lithofacies (Minor): Pillow lava

Thickness: 200 m
Upper limit: Interfingered
Lower limit: Local unconformity

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: Cape Irozaki - Nakagi - Uruijima island - Kamiono - Iruma - Aoichi - Kisami - Taushi, 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.)