This fine-grained texture is similar to the coarser intergrowths in certain pegmatites and coarse granitic veins; the quartz forms angular patches scattered through a matrix of feldspar.
In polarized light the separate areas of each mineral extinguish at the same time, and this proves that, even though apparently discontinuous, they have the same crystalline orientation.
Micrographic differs from graphic granite in being so much finer-grained that the texture can only be seen in a petrographic thin section with a microscope.
In rocks where micrographic texture is most common, it is usually interpreted as the last product of crystallization, and may represent residual melt.
The texture may commonly form in the presence of a vapor phase as well as a silicate melt, however, and vapor-rock reactions below the solidus may result in feldspar replacement and consequent compositional changes.