Uranium ore-forming systems of the - Geoscience Australia

Uranium ore-forming systems of the Lake Frome regionMap Symbol Stratigraphic Name Stratigraphic DescriptionNc Callanna Group Siltstone, locally carbonaceous; sandstone, locallystromatolitic, ripple marks, halite casts, heavy minerallamination; carbonates; evaporites; basalt, minor acid andintermediate volcanicsnd Unnamed GIS Unit - see description No description or log available (sample may or may not havebeen recovered)Nds Saddleworth Formation Mudstone; siltstone; shale, partly carbonaceous.NE Unnamed GIS Unit - see description Undifferentiated Proterozoic and/or Cambrian rocksNee Elatina Formation Sandstone, arkosic, medium grained, red-brown, slumped,ripple cross laminated; siltstone, sandy, red, dropstones andminor beds of diamictite with cobble to boulder size clasts ofdolomite, basalt, dolerite, tuff.Nia Angepena Formation Siltstone, reddish, thin bedded; interbeds of dolomite andminor grey-green shale; pisolitic and algal limestone.Nib Amberoona Formation Shales, green, finely laminated, silty; with purple and greysilty shale.Nie Enorama Shale Shale, grey-green and minor red, laminated; silty shale, rarefine grained sandstone.Nir Tarcowie Siltstone Siltstone, sandy, flaser bedded.Nirc Cox Sandstone Member Sandstone, coarse-grained; sandstone medium to finegrained,with siltstone.Niru Uroonda Siltstone Member Siltstone, grey-green, coarse; bands of coarse quartziticsiltstone.Nit Etina Formation Limestone, sandy, grey, oolitic, stromatolitic, trough crossbedding; interbedded with siltstone, grey-green. Local diapirderived conglomerate.Niy Yankaninna Formation Siltstone, grey-green, thinly bedded, calcareous, with lensesof dolomite.Niz Trezona Formation Limestone, intraclastic and stromatolitic; with interbeds ofcalcareous siltstone.Nk1 Unnamed GIS Unit - see description Siltstone rafts in diapirs. Based on red-dashed white unit onCOPLEYNk3 Unnamed GIS Unit - see description Shale rafts in diapirs. Based on blue-dashed white unit onCOPLEYNk4 Unnamed GIS Unit - see description Quartzite/sandstone rafts in diapirs. Based on blue-dottedwhite unit on COPLEYNkn Niggly Gap beds Siltstone, micaceous; sandstone; dolomite.Nl Belair Subgroup Siltstone, dark grey, laminated with minor sandstone,dolomite interbeds; quartzite, fine to coarse, feldspathic,cross bedded, minor siltstone interbeds; slateNms Skillogalee Dolomite Dolomite; marble, with magnesite mud-pellet conglomerates.Nnb Balcanoona Formation Dolomite, pale grey; limestone, dark grey, algal, oolitic.Page 144 of 151