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Hamada Mass

• Plutonic rocks
• Cretaceous

• Lithofacies: Hornblende gabbro
• Lithofacies (Minor): Quartz diorite

• Distribution (Diameter): ca. 1 km

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

• Distribution: Harinohama, Onagawa city, Oshika county, Miyagi pref.

• Takizawa et al. (1984) Geology of the Ishinomaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 103p. (in Japanese with English abstract 7p.)