Granite veins cut pelitic schists at a high angle but the veins are not folded, showing that the main schistosity predates emplacement. |
The three mountainous areas consist of large cores of igneous rocks surrounded by larger areas of metamorphic rocks, mostly schists and gneiss. |
The light colored andradite varieties topazolite and demantoid occur mainly in serpentinites and chlorite schists. |
The Burd Gol melange is also the most highly metamorphosed unit locally containing amphibolite grade staurolite and kyanite schists. |
These domes are composed of pelitic schists and gneisses folded around a core of K-feldspar granite and granitic gneiss. |
In the southern Siniscola schists, chloritoid and poikilitic garnet porphyroblasts have overgrown the earliest cleavage. |