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THE FERRUGINOUS DEPOSITSBROCKS CREEK DISTRICT
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altered alumina amphibolite Anomaly approximately assemblage average basalt bauxite bauxite deposits beds Boolarra Bore boxwork Brock's Creek district cellular limonite cent coarse conglomerate containing copper correlated Cosmopolitan Howley Crespin Decomposed basalt depth drilling east feet felspar ferruginous deposits foraminifera formation fragments Geological Map gibbsite gold gossan grade granite graphitic slates hematite Hill Howchin Howley Line Hunter River Hunter River District iddingsite ilmenite inch indicate Iron Blow Kingsgate lateritized leached outcrops lease leucoxene lignite limestone localities Lower Bowen Series Lower Marine Series miles mining Mirboo North Mount Ellison Nahoo Northern Territory occur Older Basalt olivine overburden overlying oxide Parish Parr Permian Permian Foraminifera Permian rocks Piper River pipes Plate pyrite quarry quartz quartz crystal quartzite Queensland samples sandy clay sediments shaft shown shows silica South Gippsland South Wales south-east species Springsure stratigraphical structure surface Tasmania thickness tons Upper Marine Series volcanic vugh Western Australia