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Ronden mass

• Plutonic rocks
• Cretaceous

• Lithofacies: Biotite trondhemite
• Lithofacies (Minor): Muscovite biotite granite

------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Abukuma region, Fukushima pref.

• Kano et al. (1973) Geology of the Takanuki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 109p. (in Japanese with English abstract 6p.)