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Subari Andesite (Sumi et al., 1962) Ozawa et al., 1984

Invalid synonym: Haginokatayama Andesite (andesite in Iwaya Formation)

• Type locality: Lake Subari, Fujisato city, Yamamoto county, Akita prefecture
• Volcanic rocks
• Miocene - Pliocene

• Sedimentary facies: Lava dome
• Lithofacies: Hyaloclastite
• Lithofacies: Hypersthene augite andesite lava, Tuff breccia, Volcanic lapilli tuff, Volanic breccia
• Lithofacies (Minor): Hypersthene augite hornblende andesite lava, Pyroclastic rocks, Agglomerate, Mudstone, Hornblende dacitic tuff

• Thickness: 0 - 800 m
• Distribution (East-West): ca. 13 km
• Distribution (South-North): ca. 15 km
• Upper limit: Conformity? (Tentokuji Formation), Unconformity (Sasaoka Formation)
• Lower limit: Conformity (Onnagawa Formation, Lower Funakawa Formation), Unconformity (Main part of Hayaguchigawa Formation, Ichinomatazawa Basalt Member)

• Distribution: Lake Subari, Fujisato city, Yamamoto county, Akita pref.; Tomari river, Hachimori, Happo city, Yamamoto county, Akita pref.; Futatsui town, Noshiro city - Fujisato city, Yamamoto county, Akita pref.; Mount Haginokatayama, Akita pref.: Hadachi, Noshiro city, Akita pref.
• Fossils: Brachiopods, Sharks (Carcharodon megalodon, Teeth)
• Fossils (Shellfishes): Chlamys kaneharai, Chlamys cf. swiftii, Lima yagenensis

• Murakami et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.111-120 DOI
• Ozawa et al. (1985) Geology of the Moritake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 5p.)
• Ozawa et al. (1984) Geology of the Noshiro District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 91p. (in Japanese with English abstract 9p.)
• Ozawa et al. (1983) Geology of the Nakahama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 62p. (in Japanese with English abstract 4p.)
• Hirayama and Sumi (1963) Takanosu, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 90p. (in Japanese with English abstract 7p.)
• Sumi et al. (1962) Dairakozan, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 51p. (in Japanese with English abstract 7p.)