Image: Quartzite boulder one mile north of Emigrant Pass from the Old Spanish Trail Highway in Inyo, County California
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Description: Quartzite is metamorphic, having altered from slate, the slate altering from shale. In this area, some shale is decomposing back to soft clay. As to whether this is actually quartzite, that remains in question.
Title: Quartzite boulder one mile north of Emigrant Pass from the Old Spanish Trail Highway in Inyo, County California
Credit: Own work
Author: Thomas Farley
Usage Terms: Creative Commons Zero, Public Domain Dedication
License: CC0
License Link: http://creativecommons.org/publicdomain/zero/1.0/deed.en
Attribution Required?: No
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