Red radiolarian chert--Akaiwa Seigankyo, Hokkaido.  Such chert is part of the subduction melange.  See also red chert north end of Golden Gate Bridge.  Chert is basically 100% quartz.
ID 112000556

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lin murphy
Jul 15, 2016
Red radiolarian chert--Akaiwa Seigankyo, Hokkaido. Such chert is part of the subduction melange. See also red chert north end of Golden Gate Bridge. Chert is basically 100% quartz.

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