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Rock Climbing Photo: Red radiolarian chert--Akaiwa Seigankyo, Hokkaido....
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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.

Submitted By: lin murphy on Jul 15, 2016
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