Volcanic rhyolitic airfall tuff "#WonderStone" in Nevada altered by hot water oxidizing pyrite & quartz overtime to form Liesegang #banding http://pic.twitter.com/2fHyJrBvQP
— jaime s. sincioco (@jaimessincioco) May 23, 2017
via Twitter https://twitter.com/jaimessincioco
May 23, 2017 at 06:49PM
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