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Miyata Formation

• Type locality: Urashinai creek, Kamihinokinai, Nishiki town, Senboku city Akita prefecture
• Coherent formation
• Pliocene
• Correlation: Yuguchi Formation
• Intruded by: Hornblende-bearing hypersthene augite andesite (Mount Futagami)

• Sedimentary facies: Lacustrine
• Lithofacies (Upper): Andesite lava, Tuff breccia
• Lithofacies (Lower): Tuff, Sandstone, Mudstone, Conglomerate
• Lithofacies (Lower, Minor): Lignite

• Thickness (Lower): 100 - 250 m or thicker
• Lower limit: Unconformity (Kitanomatasawa Formation, Yoroibata Formation, Omata Formation, Taiheizan Granodiorite)

• Distribution: Urashinai creek, Kamihinokinai, Nishiki town, Senboku city Akita pref.
• Fossils (Plants): Fagus crenata, Fagus ferruginea

• Ozawa and Sumi (1958) Tazawako, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 23p. (in Japanese with English abstract 4p.)
• Ozawa and Sumi (1957) Moriyoshiyama, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 42p. (in Japanese with English abstract 5p.)