Most metapelites in Scotland seasoned Barrovian metamorphism, but in a region just north of Aberdeen, metamorphism occurred at somewhat reduced pressures than vintage Barrovian metamorphism. We call this type of metamorphism Buchan metamorphism Some agates, together with carefully linked chalcedony, can glow in particularly brilliant and lime-green to yellow shade. https://orangebookmarks.com/story13243152/top-guidelines-of-difference-between-rocks-and-minerals