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Pink Sioux Quartzite Definition

Quartzite from german quarzit 1 is a hard, nonfoliated metamorphic rock which was originally sandstone2 sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic beltsre quartzite is usually white to gray, though quartzites often occur in various shades of pink and red due to varying amounts of iron oxide fe 2 o 3.