How to systematically describe two mica granite?
Two mica granite, gray, flesh red, granite structure, blocky structure.
A general description of a rock is the name, color, structure, structure, lustre, hardness, primary mineral, secondary mineral, system of subsidiary minerals, nomenclature. Some of them can be omitted from some of the description steps.
The main minerals are quartz, feldspar, acidic plagioclase, biotite and minor minerals, sericite, hornblende, accessory minerals are zircon and apatite and sphene etc.. The content of quartz is >25%. Because of the more biotite and sericite in the minor minerals, it is named two mica granite.
