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Quartzite is a hard, non-foliated metamorphic rock that was originally pure quartz sandstone. Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts, and hence quartzite is a metasandstone.
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quartz rock used silica often metamorphic sandstone grains stone sedimentary also orthoquartzite quartzites pure composed hard metamorphism texture may found
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Quartzite | Fabric | Non-foliated | 1.00 | infobox |
| Quartzite | Protoliths | Quartz Sandstone | 1.00 | infobox |
| Quartzite | is a | hard | 0.90 | text |
| Quartzite | is a | metasandstone | 0.90 | text |
| Quartzite | is a | form of silica | 0.90 | text |
| carbonates | instance of | Some quartzites contain just enough weather-susceptible nutrient-bearing minerals | 0.80 | text |
| chlorite to form a loamy | instance of | Some quartzites contain just enough weather-susceptible nutrient-bearing minerals | 0.80 | text |
| fairly fertile though shallow | instance of | Some quartzites contain just enough weather-susceptible nutrient-bearing minerals | 0.80 | text |
| stony soil.Quartzite has been used since prehistoric times for stone tools | instance of | Some quartzites contain just enough weather-susceptible nutrient-bearing minerals | 0.80 | text |
| zircon | instance of | SiO2 with only very minor amounts of iron oxide and trace resistant minerals | 0.80 | text |
| rutile | instance of | SiO2 with only very minor amounts of iron oxide and trace resistant minerals | 0.80 | text |
| magnetite | instance of | SiO2 with only very minor amounts of iron oxide and trace resistant minerals | 0.80 | text |
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