The westernmost of these contains a bed of talcose schist.
2.
Many lower mountain ranges are composed of coarse granite sandstone, while rocks at the highest elevations consist of gneiss among upheaved strata of mica and talcose slate.
3.
The most common hydrothermal alteration assemblages are chloritic ( including Mg-rich ones ) and phyllic alteration ( dominated by sericite , mostly illite ), and also silicification, deep and shallow talcose alteration, and ferruginous ( including Fe oxides, carbonates and sulfides ) alteration.
मोबाइल