There are two alternative ways that rocks tend to be categorised; the initial is predicated around the procedures by which they form, where rocks are classified as both sedimentary, igneous, and metamorphic. Rocks are also frequently categorised by grain or crystal dimension. Encyclopaedia Britannica's editors oversee subject matter parts wherein https://rocksticks01122.59bloggers.com/36751173/the-personalised-sweets-diaries