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Otaki Dolerites

• Volcanic rocks
• Miocene
• Intruded in: Otaki Formation

• Sedimentary facies: Dykes, Sills
• Lithofacies: Dolerite, Basalt
• Lithofacies (Marginal): Porphyritic, Andesitic
• Lithofacies (Minor): Doleritic pegmatite

• Distribution (Width): A few - 20 and several dozen m

• Distribution: Yamagata pref.

• Ozawa and Sumi (1961) Uzenkaneyama, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 66p. (in Japanese with English abstract 5p.)