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Kiyotakizawa Andesite Member

Invalid synonym: Sawabe Andesite, Henashi Andesite

• Type locality: middle - upper reaches of Kiyotaki creek, Fukaura city, Nishitsugaru county, Aomori prefecture
• Volcanic rocks
• middle Miocene

• Sedimentary facies (Lower): Marine
• Sedimentary facies: Transgressive
• Lithofacies (Upper): Andesitic tuff breccia, Lapilli tuff
• Lithofacies (Upper, Minor): Andesite lava, Pumice tuff, Tuffaceous sandstone
• Lithofacies (Middle): Conglomerate, Sandstone
• Lithofacies (Middle, Minor): Mudstone, Pumice tuff
• Lithofacies (Lower): Andesitic tuff breccia, Lapilli tuff, Andesite lava
• Sedimentary structures (Middle): Cross stratification, Parallel stratification

• Thickness: 600 m or thicker
• Thickness (Upper): 200 - 400 m
• Thickness (Middle): 200 - 300 m
• Thickness (Lower): 100 m or thicker
• Upper limit: Transitional (Azumagawa Rhyolite Member)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Kiyotaki creek - Ofune? creek - Shodoji river, Fukaura city, Nishitsugaru county, Aomori pref.; Kyuroku island, Fukaura city, Nishitsugaru county, Aomori pref.
• Fossils (Middle): Shellfishes, Plants

• Hirayama and Uemura (1985) Geology of the Ajigasawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 86p. (in Japanese with English abstract 6p.)
• Moritani (1968) Geology of the Fukaura District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 5p.)