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Ys1

• Plutonic rocks
• Central facies of Goyosan Pluton
• Early Cretaceous

• Lithofacies: Biotite hornblende granodiorite, Biotite hornblende tonalite, Hornblende biotite granodiorite
• Lithofacies (Color index): 30 - 46

• Upper limit: Transitional (Ys2)

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

• Distribution: Mount Goyozan, Kamaishi city, Kunohe county, Iwate pref.

• Nishioka and Yoshikawa (2004) Geology of the Ryori District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 49p. (in Japanese with English abstract 3p.)