There's two other ways that rocks are often labeled; the very first relies around the procedures by which they variety, by which rocks are classified as both sedimentary, igneous, and metamorphic. Rocks are frequently classified by grain or crystal measurement. Sedimentary rocks are formed from deposited and lithified mineral content. https://personalisedsweets45677.blogripley.com/37034541/how-rock-sticks-can-save-you-time-stress-and-money