From (m) To (m) Colour Stratigraphic Unit Rock Mineralisation/Veining Comments 0 5.5 Red/Brown Regolith - Laterite Pisolitic laterite Pisolitic consolidated and unconsolidated laterite 5.5 11 Brown/Cream Regolith - Mottled Zone "Clay, Sandstone" Hematite-rich zones in clays/sand 11 45 Yellow/Brown Regolith - Saprolite "Clay, Sandstone" Weathered zone with clays after siltstone and sandstone 45 51.5 Purple/Cream Limbunyah Group Mallaboh Dolostone "Mudstone, Siltstone" Intrebedded mudstone and siltstone sequence. Laminated. 51.5 56 Red/Grey Limbunyah Group Mallaboh Dolostone Chert Trace pyrite Brecciated chert 56 96.1 Grey/Green Limbunyah Group Mallaboh Dolostone "Siltsone, Mudtone" Pyrite bands at 60m Sequence of stromatolitic siltstone and mudstone. Laminated. 96.1 141.2 Purple/Green Limbunyah Group Amos Knob Formation Mudstone Amethyst in quartz Laminated mudstones purple and green alternating beds. Amethyst (purple) with quartz from 96.1 to 108m. 141.2 162.5 Grey Limbunyah Group Amos Knob Formation "Quartz sandstone, Siltstone, Mudstone" Quartz sandstone with siltstone and mudstone. Graded sequence. Quartz is clear. Fault at 141.2m. 162.5 178 Pink/Green Limbunyah Group Pear Tree Dolostone "Dolomite, Mudstone, Siltstone" Stromatolite bearing dolomitic mudtones and siltstones. Younging up hole. Minor conglomerate/breccia beds. One thin chert bed. Bedding perpendicular to long core axis. 178 184.35 Brown/Grey Limbunyah Group Margery Formation "Shale, Siltstone" Blebby pyrite throughout Laminated shale and silstone 184.35 191.85 Grey Limbunyah Group Margery Formation "Dolomite, Siltstone, Mudstone, Sandstone" Trace blebby pyrite Dolomitic sedimentary unit. Some stromatolites. 191.85 193.75 Grey Limbunyah Group Margery Formation "Sandstone, Siltstone, Conglomerate" Trace blebby pyrite Quartz sandstone and stromatolite fragments and sedimentary fragments 193.75 204.3 Green Limbunyah Group Margery Formation "Dolomite, Mudstone, Siltstone" Thin pyrite bands + hematite Green dolomitised siltstone and mudstone 204.3 211.2 Grey/Green Limbunyah Group Margery Formation Sandstone Trace pyrite Quartz-rich grey sandstone with minor mudstone and conglomerate zones. 211.2 322.8 Purple/Orange Limbunyah Group Stirling Sandstone Sandstone Calcite veining at 250m Purple-orange massive to bedded quartz sandstone. Oxidised. Bedding around 85 degrees to long core axis. Erosional unconformity 322.8 334.4 Red/Brown Inverway Metamorphics "Mudstone, Sandstone" Hematised massive mudstone and sandstone. 334.4 351.7 Grey/Red/Brown Inverway Metamorphics "Basalt, Mudstone, Sandstone" Thin oxidised basalt sills/dykes in oxidised mudstone-sandstone. Basalt has distinct mafic texture. 351.7 384.25 Red/Brown Inverway Metamorphics "Breccia, Siltstone, Sandstone" "Oxidised sedimentary breccia, sandstone and mustone. Bedding at 60 degrees to long core axis." 384.25 397.8 Grey Inverway Metamorphics "Quartz sandstone, Siltstone" Vugs intermittent throughout unit containing pyrite-chalcopyrite Siliceous sandstone-silstone (once dolomitic). Containing vugs with quartz-pyrite and chalcopyrite crystals. Bedding at 60 degrees to long core axis. 397.8 415.3 Brown/Grey Inverway Metamorphics "Siltstone, Sandstone, Breccia" Pyrite 413-415.3m Silica overprinting oxidised mudstone/silstone/breccia 415.3 528 Grey/Black/Green Inverway Metamorphics "Basalt, Siltstone, Sandstone" Trace pyrite + magnetite "Basaltic sills intruding silstone-sandstone. Basalt 421.4-421.15m, 436.95-445.15m, 448.75-449.35m, 451.3-452m, 460.8-471.5m, 474.3-507.95m, 510.2-510.45m, 516-516.3m, 517.25-524.1m, 524.95-528m. Basalt fine grained and highly magnetic." 528 595.35 Grey/Pink/Brown Inverway Metamorphics "Dolomitic sandstone, silstone" Trace pyrite + carbonate veins Dolomitic sandstone-siltstone. Foliated and cleaved. Bedding at 50 degrees to long core axis. Metamorphosed sediments. 595.35 746 Grey/Red/Brown/Black Inverway Metamorphics "Basalt, Sandstone, Breccia" Minor carbonate veinlets "Basaltic sills intruding sandstone and breccia. Basalt 595.35-600.3m, 619.2-628.15m, 634.9-645.2m, 647.2-660.6m, 669.5-725.5m, 730.6-734m, 737-740m, 742.85-746m. Basalt fine grained and highly magnetic." 746 751 Red/Pink Inverway Metamorphics Sandstone Massive pink-red silicified sandstone.