Okumino Acid Igneous Complex

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Okumino Acid Igneous Complex Tanase, 1982

Volcanic rocks
Late Cretaceous (80 - 70 Ma)
Intruded by: Sami-Kadowasa Parallel Dike Swarm, Quartz porphyry, Granite porphyry, Felsic rocks, Granodiorite porphyry, Granite

Sedimentary facies (Minor): Lacustrine
Lithofacies: Rhyolite - Rhyolitic dacite pyroclastic rocks, Lava
Lithofacies (Minor): Dacite pyroclastic rocks, Lava, Basalt

Northeastern part
[ North ]
~~~~~~~~~~~~~~
Nyudani Mass
~~~~~~~~~~~~~~
Hachiman Mass
~~~~~~~~~~~~~~
[ South ]

Southwestern part
[ North ]
~~~~~~~~~~~~~~
Omodani Mass
~~~~~~~~~~~~~~
Akeshidani Mass
~~~~~~~~~~~~~~
Itadori Mass
~~~~~~~~~~~~~~
Horado Mass
~~~~~~~~~~~~~~
Yanajimayama Mass
~~~~~~~~~~~~~~
[ South ]

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

Distribution: Okumino region, Gifu pref.; Okuetsu region, Fukui pref.

Wakita (1995) Geology of the Mino District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 36p. (in Japanese with English abstract 3p.)
Wakita (1984) Geology of the Hachiman District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 89p. (in Japanese with English abstract 6p.)