A type of crystalloblastic texture in a metamorphic rock in which the essential mineral constituents are of two or more distinct size The individual form of the minerals in a rock formed by metamorphic recrystallization. The interlocking of grains of two different minerals as a result of their simultaneous crystallization A type of crystalloblastic texture in a metamorphic rock in which the essential mineral constituents are essentially of the same size. The replacement of one mineral grain by another as a result of some metamorphic reaction. the geometrical aspects of the constituent particles of a rock The individual form of a single mineral formed by metamorphic recrystallization a metamorphic texture consisting of bands of inclusions that indicate original bedding or schistosity of the parent rock and cut through later-formed crystals of the metamorphic rock. Said of a mineral grain that is bounded partly by its own rational faces and partly by surfaces formed against preexisting grains as a result of recrystallization. Texture of a recrystallized rock in which the shape of the grains is threadlike. A mineral constituent of a metamorphic rock formed by recrystallization and lacking crystal faces. Intergrowth of alkali feldspar and plagioclase feldspar where the more sodic plagioclase feldspar appears to be exsolved from the more potassic alkali feldspar. Grains of black magnetite surrounded by white grains of feldspar and quartz in amphibolite. Colloquial term used in Mid-Atlantic region of the United States. a texture produced by the intimate intergrowth of two different minerals; sometimes the term is restricted to such textures of secondary origin Intergrowth of alkali feldspar and plagioclase feldspar where the more potassic alkali feldspar appears to be exsolved from the more sodic plagioclase feldspar An intergrowth of plagioclase feldspar (commonly oligoclase) and vermicular quartz, generally replacing potassium feldspar. A mineral constituent of a metamorphic rock formed by recrystallization and bounded by its own crystal faces A texture in a nonschistose metamorphic rock upon which recrystallization formed essentially equidimensional crystals with normally well sutured boundaries a texture in a heteroblastic rock in which the crystalloblasts, not necessarily of the same mineral, are clustered in irregular groups. A texture in which axes of contiguous crystals lie in diverse, crisscross directions that are not random. A mineral intergrowth,with angular planar boundaries resembling cuneiform writing. Crystals that develop under conditions of rapid growth and high degrees of supersaturation so that atoms or ions are added more rapidly to edges and corners of growing crystals, resulting in branched "dendrites" or hollow stepped depressions a recrystallized metamorphic rock having large idioblasts of minerals in a finer-grained crystalloblastic matrix a metamorphic texture in which small grains of one constituent lie within larger metacrysts. A microscopic zone of minerals, usually arranged radially around another mineral. Slender needlelike crystal