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Onikobe caldera

• Type locality: Naruko - Akinomiya, Miyagi prefecture
• Volcanic rocks
• Collapse caldera
• Pleistocene

• Distribution (Diamter): ca. 15 km

• Distribution: Naruko - Akinomiya, Miyagi pref.

• Tsuchiya et al. (1997) Geology of the Iwagasaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 96p. (in Japanese with English abstract 4p.)