List of Abbreviations Abbreviation Word Abbreviation Word AMP amphibolite mg medium grained amph amphibole mica mica be beige mn "Manganese Oxide, Pyrolusite" bio biotite mt magnetite bk black musc muscovite bn brown or orange brn bornite Ox Oxidised BXX breccia PEG pegmatite calc calcite pl pale carb carbonate plag plagioclase CCRT calcrete po pyrrhotite cg coarse grained POR porhyry chl chlorite Pox Partially Oxidised cly clay px pyroxene COL colluvium PXT pyroxenite diop diopside qtz quartz dk dark qv / QV vein quartz DOL dolerite QZT Quartzite dolo dolomite rd red ep epidote s strong FEST Ironstone SAP saprolite fg fine grained SAPF saprolite ferruginous zone FGE Fault Gouge SAPM saprolite mottled zone FR Fresh Rock SAPP saprolite palid zone fs feldspar SAPR saprock FW Footwall SCH schist g grain ser sericite gn green SKN skarn GNS gneiss SLT slate GNSC calcareous gneiss SOL soil go geothite tour tourmaline gt garnet Tox Totally Oxidised gy grey TR trace HW Hangingwall trm tremolite JSP jasper v very kln kaolinite ve vermiculite ksp potassic feldspar vn vein lim limonite w weak lt light wh white m medium / moderate yw yellow MBL marble