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Horado Mass
- Volcanic rocks
- Late Cretaceous (68.1 Ma, K-Ar)
- Intruded by: Koka Granite
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Wakita (1995) Geology of the Mino District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 36p. (in Japanese with English abstract 3p.)
- Wakita (1984) Geology of the Hachiman District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 89p. (in Japanese with English abstract 6p.)