Yamayatoge Body

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Yamayatoge Body

Ophiolite
Island arc ophiolite
Ordovician (420, 350 Ma, Nd-model)

Lithofacies: Serpentinite
Lithofacies (Minor): Amphibolite
Lithofacies (Protolith): Harzburgite, Dunite
Lithofacies (Protolith, Minor): Wehrlite

Distribution (Width): ca. 300 m
Distribution (Length): ca. 3.5 km

Nakadake Serpentinite
[ East ]
::::::::::::::
Nakadake Body
::::::::::::::
Kasamoriyama Body
::::::::::::::
Yamayatoge Body
::::::::::::::
[ West ]

Hayachine Complex
[ Upper ]
--------------
Kagura Igneous Rocks
::::::::::::::
Kuromoriyama Amphibolite
::::::::::::::
Nakadake Serpentinite
?--?--?--?--?-
[ Lower ]

South Kitakami Belt (Osako, Iwate pref.)
[ Upper ]
?--?--?--?--?-
Uchikawame Formation
?--?--?--?--?-
Funakubo Formation / Odagoe Formation
?--?--?--?--?-
Orikabetoge Formation
--------------
Nameirizawa Formation
::::::::::::::
Hayachine Complex
?--?--?--?--?-
[ Lower ]

South Kitakami Belt (Kawai, Iwate pref.)
[ Upper ]
?--?--?--?--?-
Yakushigawa Formation
--------------
Hayachine Complex
?--?--?--?--?-
[ Lower ]

South Kitakami Belt (Kamaishi, Iwate pref.)
[ Upper ]
?--?--?--?--?-
Nakawada Formation
/--/--/--/--/-
Kogawa Formation
~~~~~~~~~~~~~~
Senjogataki Formation
::::::::::::::
Hayachine Complex
?--?--?--?--?-
[ Lower ]

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

Distribution: Itsutsuba - Mount Kuromori, Shiwa city, Shiwa county, Iwate pref.

Kawamura et al. (2013) Geology of the Hayachine San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 101p. (in Japanese with English abstract 4p.)