The popular textural conditions used for rock forms with regard to the size with the grains or crystals, are provided inside the Desk. The particle-dimension categories are derived from the Udden-Wentworth scale made for sediment. For igneous and metamorphic rocks, the phrases are frequently made use of as modifiers— If https://www.generationgenius.com/videolessons/rocks-and-minerals-video-for-kids/