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Sannomegata maar

• Type locality: Togashiohama, Oga city, Akita prefecture
• Maar volcano
• Volcanic rocks
• Pleistocene (24 - 20 ka, ¹⁴C, Tephra)

• Sedimentary facies: Base surge deposit
• Lithofacies: High-alumina basalt scoria volcanic lapilli, Volcanic ash
• Sedimentary structures: Graded bedding

• Distribution (Diameter): ca. 0.5 km at the maximum
• Thickness: 1.4 m

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

• Distribution: Togashiohama, 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.)
• Satsukawa and Michibayashi (2009) Jour. Geol. Soc. Japan, vol.115, no.6, pp.288-291 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