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Nomuragawa Dacite I Kobayashi et al., 2004

Invalid synonym: Sugorokusawa Dacite

• Type locality: Upper reaches of Nomura river, Oga city, Akita prefecture
• Type locality (Sub): Sugorokusawa river, Oga city, Akita prefecture
• Volcanic rocks
• early Miocene (22.0, 21.0, 20.9 Ma, FT)

• Lithofacies: Pyroclastic flow deposit
• Lithofacies: Biotite orthopyroxene clinopyroxene dacitic welded lapilli tuff, Tuff

• Source: Honzan Vent-filling Deposit
• Thickness: 150 - 200 m
• Upper limit: Conformity (Nomuragawa Basalt), Onlap unconformity (Daijima Formation), Abut unconformity (Tateyamazaki Dacite)
• Lower limit: Conformity (Nomuragawa Tuffaceous Conglomerate), Unconformity (Monzen Formation)

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

• Distribution: Oga peninsula, Akita pref.
• Distribution: Upper reaches of Nomura river, Oga city, Akita pref.; Cape Tateyamazaki - Cape Shiosenomisaki - Sugoroku river - Sugorokugaw river, Oga city, Akita pref.; Komasu river, Masukawa, Funagawaminato, Oga city, Akita pref.; Taki river, Oganaka, Oga city, Akita pref.; Kanagasaki, Toga, Oga city, Akita pref.

• Kano et al. (2011) Geology of the Toga and Funakawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 127p. (in Japanese with English abstract 4p.)
• Kobayashi et al. (2010) Jour. Geol. Soc. Japan, vol.116, no.10, pp.552-562 DOI
• Sato et al. (2009) Jour. Geol. Soc. Japan, vol.115, no.1, pp.31-46 DOI
• Ohguchi et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.17-32 DOI
• Fujimoto et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.51-74 DOI