出典:Wiktionary
granoblastic (comparative more granoblastic, superlative most granoblastic)
出典:Wikipedia
出典:『Wikipedia』 (2009/06/14 14:17 UTC 版)
Granoblastic is an anhedral phaneritic equi-granular metamorphic rock texture. Granoblastic texture is typical of quartzite, marble and other non-foliated metamorphic rocks without porphyroblasts. Characteristics defining granoblastic texture include: grains visible to the unaided eye, sutured boundaries and approximately equidimensional grains. The grain boundaries intersect at 120° triple junctions under ideal conditions. Variation from the ideal results from stress produced foliation during crystallization resulting in schistose textures.