There are two alternative ways that rocks are frequently labeled; the 1st is predicated about the processes by which they variety, where rocks are categorized as possibly sedimentary, igneous, and metamorphic. Rocks will also be generally categorised by grain or crystal sizing. Encyclopaedia Britannica's editors oversee subject matter spots by https://rock-sticks45667.blog-ezine.com/36571023/not-known-details-about-rock-sticks