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Kumano Acidic Rocks

Synonym: Kumano Acidic Igneous Rocks

• Plutonic rocks
• Granitoids of Outer zone, Southwest Japan
• Large scale felsic igneous rocks associated with caldera formation
• Felsic volcano-plutonic complex
• middle Miocene (15 - 14 Ma, K-Ar; 15 - 13 Ma, FT)
• Intruded in: Hidakagawa Group, Otonashigawa Group, Muro Group, Kumano Group

• Lithofacies: Felsic rocks
• Lithofacies: Biotite granite porphyry, Lapilli tuff, Biotite rhyolite
• Lithofacies (Dikes): Biotite rhyolite, Quartz porphyry, Granophyre

• Eruptive volume: ca. 780 km³
• Distribution: 60 x 25 km²
• Volume: ca. 300 km³

------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Ichiura, Isozaki village, Kumano city, Mie pref.; Oyamaura, Kihoku city, Kitamuro county, Mie pref.; Hitari - Yamamoto - Echizentoge pass - Amasednai valley, Shingu city, Wakayama pref.

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