Explanation
-Three kinds of metamorphic rock with obvious schistose structure. It often has scaly (fibrous) and granular balastic texture. The schistose columnar minerals are mostly mica, chlorite, talc, hornblende, etc. The granular minerals are feldspar and quartze; There is also a small amount of metamorphic phenocryst of iron almandine, staurolite, kyanite and other characteristic metamorphic minerals. According to mineral composition. It can be divided into mica schist, hornblende schist, chlorite schist, talc schist or quartz schist, etc. According to the original rock nature and chemical composition, it can be divided into argillaceous schist, magnesium rich schist, basic schist and felsic schist.
Classification
Natural materials and products -> Mineral materials