Category Code Description Alteration / Mineralisation Style BA banded BB "blebs, phenocrysts" BED along bedding planes BX breccia DIS disseminated FL on foliations FRAC fracture coating LAM laminae LIES liesagang banding MAS massive MOT irregular mottles / patchy / blotchy MTC mineral type controlled replacement MTX matrix replacement or infill PERV pervasive RTC rock type controlled replacement SEC secondary SELV selvage / halo SH in shears ST stringers SW stockwork VN veins Alteration Intensity unaltered 1 weak 2 moderate 3 strong 4 intense Alteration Type CAL calcite CHL chlorite CRB carbonate CY clay HEM hematite KAO kaolinite LIM limonite MGT magnetite MN manganese PY pyrite SER sericite SI silicified SID siderite UA unaltered UD undefined Colour BK black BL blue BR brown CR cream GR green GY gray IR iridescent KH khaki MA maroon OL olive OR orange PI pink PU purple RD red VI violet WH white YE yellow Colour Intensity BT bright DK dark LT light MD medium PL pale Dryness D dry L liquid M moist S sticky W wet Geological Unit BLD Balbirini Dolomite - Upper member of the Nathan Group CTS Cretaceous KYM Kyalla Member of Roper Group McMInn Formation MSM Moroak Sandstone Member of Roper Group McMInn Formation SIM Sherwin Ironstone Member - Roper Group TC Tertiary Cover TRN Transported recent cover TT Tertiary laterite UND Undecided VF Velkerri Formation Grain Size CG coarse grained FCG fine to coarse grained FG fine grained FMG fine to medium grained MCG medium to coarse grained MG medium grained VCG very coarse grained VFF very fine to fine grained VFG very fine grained Hardness 1 friable (crumbles in hand) 2 moderately friable (locally friable over interval) 3 moderately competent (can pick grains off) 4 hard / competent 5 unconsolidated Mineral Intensity 1 weak 2 moderate 3 strong 4 very strong 5 very weak / trace Mineralisation FEO iron oxide GOE goethite HEM hematite LIM limonite MAG magnetite MGH maghemite MNO manganese oxides PY pyrite PYO oxidised pyrite SPC specular hematite TOR tourmaline Oxidation FR fresh rock H highly weathered / oxidised M moderately weathered / oxidised VH very highly weathered / oxidised W weakly weathered / oxidised Rock Type ALG algal silt/very fine grained rock with algal laminations BX breccia CAL calcrete CAV cavity CBR carbonate rock CH chlorite CHT chert CL core loss CNG conglomerate CY clay CYST claystone DLS dolomitic shale (dololutite) DLT dolerite DOL dolomite FES ironstone FEST ferruginous sandstone FRCT ferricrete GOS gossan GVL gravel GWK greywacke HEMOO oolite (surface only) HOO hematitic oolite (mineralised) HSLT hematitic siltstone (mineralised) MBX matrix supported breccia MST mudstone NR no recovery OO oolite OSH oolitic shale OST oolitic sandstone PEG pegmatite PIS pisolite PST pebbly sandstone QBX quartz breccia QVN quartz vein SHL shale SIDOO siderite oolite SIDSOO sideritic sandy oolite SILOO siliceous oolite (silica ooids) SLT siltstone SND sand SOL soil SOO sandy oolite (oolite with 10->25% detrital quartz grains) SST sandstone SZ shear zone UND undifferentiated Structure BED bedding BOU boudinaged BOX boxwork BR broken BX breccia CAT cataclastic CLV cleaved CRS crushed DEF deformed FD folded FLT faulted FOL foliation FRAC fractured FRG fragmental JO jointed LI lineation(s) QV quartz vein(s) SH sheared SHK shear fabrics (kinematic indicators) SL slickenside(s) STY stylolitise(s) TEN tension gash(es) VN vein(s) Structure Confidence 1 Poor - One BOH mark; core does not dock with other BOH marks 2 Moderate - BOH mark does not quite match up with second BOH mark in docked core (<15mm) 3 Good - 2 BOH marks that line up through docked core; 1 BOH mark that positions correctly relative to reference structure 4 Excellent - 3 BOH marks that line up through docked core Sturcture Intensity 1 weak 2 moderate 3 strong 4 very strong 5 very weak / trace Texture BA banded BED bedded BOX boxwork BX brecciated CMT cemented CX cryptocrystalline FIS fissile FR friable IND indurated LAM laminated LEA leached LIES liesagang banding MAG magnetic MAS massive MOT mottled NOD nodular PIS pisolitic PORS porous PS pseudomorph SIL siliceous SPT spotted SPX spinifex STM stromatilitic UND undifferentiated VN veined VU vuggy Vein Style BF brittle fracture BX breccia CX crackle breccia EX extensional FL along foliations LM laminated MA massive PG ptygmatic SG sugary ST stringers SW stockwork VL veinlets