The prevalent textural phrases used for rock sorts with respect to the scale in the grains or crystals, are given within the Table. The particle-measurement categories are derived from the Udden-Wentworth scale created for sediment. For igneous and metamorphic rocks, the phrases are normally applied as modifiers— • Prograde metamorphic https://leftbookmarks.com/story13248100/not-known-factual-statements-about-difference-between-rocks-and-minerals