talcose การใช้

• The westernmost of these contains a bed of talcose schist.
• 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.
• 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.