DescriptionQuartzite boulder one mile north of Emigrant Pass from the Old Spanish Trail Highway in Inyo, County California.jpg
English: 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.
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Captions
Beautiful looking red boulders at this location, north of Emigrant Pass.