Explanation
"A large class of igneous rocks with SiO2 '' content higher than 63%. It is mainly composed of light colored minerals such as quartze, acid plagioclase and alkaline feldspar, but contains a small amount of dark colored minerals such as biotite, muscovilte, hornblende, etc. rock are generally light in color, mostly grayish white. granite and granodiorite are the most common acidic intrusive rocks, and rhyolite is the most common eject rocks. acidic rock are very rich in minerals, including tungsten, tin, beryllium, copper, lead Zinc, iron, gold, niobium, tantalum, rare earth, kaolin, bentonite, zeolite, pyrophyllite, alunite, fluorite, etc.
Classification
Natural materials and products -> Mineral materials