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Mikasa Andesite (Makiyama, 1926) Harumoto, 1932

• Type locality: Mikasa hot spring, Nara city, Nara prefecture
• Volcanic rocks
• Miocene (13.3, 13.1 Ma, K-Ar; 13.0 Ma, FT)
• Intruded by: Olivine dolerite dike

• Lithofacies: Hornblende hypersthene augite andesite
• Lithofacies (Minor): Lapilli tuff, Dolirite dike
• Lithofacies (Lower): Andesite tuff breccia

• Thickness: 90 m or thinner
• Thickness (Lower): 10 m or thinner
• Upper limit: Unconformity (Osaka Group)
• Lower limit: Unconformity (Iimori Conglomerate Member)

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

• Distribution: Mikasa hot spring - Mount Wakakusayama - Mount Kasugayama - Imori town - Gyakugoji town - Rokuyaon town, Nara city, Nara pref.

• Sato et al. (2012) Jour. Geol. Soc. Japan, vol.118, Supplement, pp.53-69 DOI
• Ozaki et al. (2000) Geology of the Nara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 162p. (in Japanese with English abstract 5p.)