Gabbroic rocks

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Gabbroic rocks

Plutonic rocks
Early Cretaceous
Intruded by: Yoshihama type
Intruded in: Kamaishi Formation, Ryori Formation

Lithofacies: Hornblende gabbro, Biotite hornblende gabbro, Biotite hornblende quartz diorite

Distribution: Marginal parts of the pluton

Goyosan Pluton
[ Young ]
~~~~~~~~~~~~~~
Okuboyama type / Kuroiwa type
~~~~~~~~~~~~~~
Yoshihama type
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Gabbroic rocks
~~~~~~~~~~~~~~
[ Old ]

V Zone
[ North ]
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Kurihashi quartz diorite
~~~~~~~~~~~~~~
Tono Granodiorite
~~~~~~~~~~~~~~
Hitokabe Granite
~~~~~~~~~~~~~~
Goyosan Pluton
~~~~~~~~~~~~~~
Senmaya Tonalitic Pluton
~~~~~~~~~~~~~~
[ South ]

Kitakami mountains plutonic rocks
[ East ]
~~~~~~~~~~~~~~
I Zone
~~~~~~~~~~~~~~
II Zone
~~~~~~~~~~~~~~
III Zone
~~~~~~~~~~~~~~
IV Zone
~~~~~~~~~~~~~~
V Zone
~~~~~~~~~~~~~~
VIa Zone
~~~~~~~~~~~~~~
VIb Zone
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[ West ]

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

Distribution: Nonomae - Tonohata - Sunagohama - Myojindo, Sanriku town, Ofunato city, Iwate pref.; Takisawa, Tono city, 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.)