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Fujikuragawa Formation Ozawa et al., 1961

• Type locality: Fujikura river, Soma, Hirosaki city, Aomori prefecture; Iwadate seashore - Yokoma seachore, Hachimori, Happo city, Yamamoto county, Akita prefecture
• Volcanic rocks
• early Miocene
• Intruded by: Sugozaki Quartz Andesite, Augite olivine dolerite, Augite olivine basalt
• Correlation: Monzen Formation

• Lithofacies: Pyroxene andesitic lapilli tuff, Pyroxene andesite lava
• Lithofacies (Basal): Conglomerate
• Lithofacies (Minor): Andesitic tuff, Tuff breccia, Basalt lava, Basaltic lapilli tuff, Shale

• Thickness: 100 - 1,400 m
• Upper limit (Otose Formation): Bottom of andesitic volcaniclastic rocks intercalating rhyolitic tuff and/or sandstone having clear stratification
• Upper limit (Kuroishizawa Formation): Bottom of andesitic lapilli tuff bed or plant fossils-bearing mudstone/shale
• Upper limit: Transitional (Kuroishizawa Formation), Conformity (Otose Formation)
• Lower limit: Unconformity (Shirakamidake Granitic Complex, Osawagawa Formation, Nishimeya Granites)

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

• Distribution: Fujikura river, Soma, Hirosaki city, Aomori pref.; Nanatsudaki, Nishimeya city, Nakatsugaru county, Aomori pref.; Asahimata creek, Osawa river, Nishimeya city, Nakatsugaru county, Aomori pref.; Omine creek - Komine creek, Iwasaki, Fukaura city, Nishitsugaru county, Aomori pref.; Mount Nakamate, Fukaura city, Nishitsugaru county, Aomori pref.; Iwadate seashore - Yokoma seachore - Nakahama - Koiri river, Hachimori, Happo city, Yamamoto county, Akita pref.; Okawame river - Numazawa, Odate city, Akita pref.; Manaka - Mount Tonose - Kotsubo creek, Hinai town, Odate city, Akita pref.; Mato river, Takanosu town, Kitaakita city, Akita pref.
• Fossils: Plant fragments

• Watanuki et al. (2017) Jour. Geol. Soc. Japan, vol.123, no.7, pp.533-549 DOI
• 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.)
• Moritani (1968) Geology of the Fukaura District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 5p.)
• 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.)
• Ozawa (1963) Iwadate, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 14p. (in Japanese with English abstract 3p.)
• Ozawa (1962) Hirosaki, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 52p. (in Japanese with English abstract 5p.)
• 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.)