This document provides information on various classification schemes for igneous and volcanic rocks, including: - The classification of plutonic, hypabyssal, and volcanic rocks based on their depth of crystallization. - A triangular diagram classification of phaneritic igneous rocks based on their quartz, alkali feldspar, and plagioclase percentages. - Additional classifications of gabbroic and ultramafic rocks, as well as volcanic rocks, based on their mineralogical compositions.