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Asuna Granite

• Type locality (Granite): Asuna, nan city, Ochi county, Shimane prefecture
• Type locality (Diorite): Hikishiro, nan city, Ochi county, Shimane prefecture
• Plutonic rocks
• Eocene (41 - 36 Ma, K-Ar)
• Intruded in: Ochi Group, Tsunotani FormationSakugi Volcanic Rocks, Shinzojiyama Rhyolites, Takada Rhyolites, Onbara Granite

• Lithofacies: Biotite granite
• Lithofacies (Minor): Granite porphyry, Granophyre, Hornblende biotite granodiorite, Clinopyroxene-bearing hornblende biotite quartz diorite

• Distribution (Length): ca. 26 km
• Distribution (Width): ca. 6 km
• Upper limit: Unconformity (Higher Terrace Deposits)

• Distribution: Asuna - Hikishiro - Ushiroyama - Oniwa - Tabizako - Mount Seigojiyama? - Tadokoro - Wada - Masubuchi - Umanohara - ichigi, Onan city, Ochi county, Shimane pref. Tanohara, Misato city, Ochi county, Shimane pref.; Nobori, Kitahiroshima city, Yamagata county, Hiroshima pref.

• Matsuura (1990) Geology of the Akana District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 73p. (in Japanese with English abstract 5p.)