The relation and difference between quartz sandstone and quartzite
Quartzite is a product of the thermal metamorphism of various quartz sandstones. Generally white or grey, with aphanitic or fine-grained granoblastic texture, massive structure, sometimes with a bit of schistosity structure. The mineral composition is mainly quartz (.>85%), followed by feldspar. Hardness, add hydrochloric acid does not bubble. The hardness and strength are greater than that of quartz sandstone.
Quartz sandstone: the color is shallow, often is pale yellow, gray white, the clastic mineral is mainly quartz, the content is above 80%, followed by may contain the small amount of feldspar, the micro plagioclase and the acid plagioclase and the small amount of cuttings. Quartz sand has a high degree of roundness and good separation. Is not stable thick layered, cross bedding and ripple mark. Calcareous quartz sandstone sometimes contains a small amount of calcareous shells.
The quartz sandstone is a sedimentary rock with a quartz content of >50% sandstone is a quartz sand rock and a rock is a metamorphic rock should be such a ^
