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Chiya Volcanic Rocks

• Volcanic rocks
• Pleistocene
• Intruded by: Granodiorite

• Lithofacies: Dacite - Rhyolite tuff, Lapilli tuff
• Lithofacies (Minor): Andesite lava, Tuff, Conglomerate
• Sedimentary structures: Graded bedding

• Upper limit: Unconformity (Takao Andesite)
• Lower limit: Unconformity (Yanomine Body)

• Distribution: Mount Miiyama - Misaka - Sangaichi - Okutani - Akaishitoge pass - Chiyan-Naruji - Chiya-Sanedani - Yogo - Onzen - Yomogi - Mount Takahatayama, Niimi city, Okayama pref.

• Hattori (1978) Geology of the Kami-Iwami District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 65p. (in Japanese with English abstract 4p.)