Uranium ore-forming systems of the - Geoscience Australia

Uranium ore-forming systems of the Lake Frome regionMap Symbol Stratigraphic Name Stratigraphic DescriptionEhr Mernmerna Formation Limestone; bioherm complexes. Slope, platform biohermcomplexes, distal slope environments; turbidites; nodularwackestone; black laminated lime mud.Ehw Wilkawillina Limestone Archaeocyath-calcimicrobe limestone.E-m Mooracoochie Volcanics Tuff; lapilli-tuff; trachyte; rhyolite and crystal tuff;conglomerate and agglomerate.EO Unnamed GIS Unit - see description Undifferentiated Cambrian-Ordovician rocksEo Moralana Supergroup Sandstone, feldspathic, red, white, minor pyritic shale;siltstone; limestone, fossiliferous, oolitic, stromatolitic, withminor sandstone and siltstoneEob Billy Creek Formation Siltstone, shale, dolomite, with tuff beds. Age 522.8+/-1.8Ma(U-Pb).Eobc Coads Hill Member Sandstone, pale brown,fine to medium-grained; limestone,dark grey; shale, red and green; shaly siltstone.Conglomerate at the base. Some tuff beds.Eobd Edeowie Limestone Member Mudstone, dolomitic, with planar to wavy lamination;limestone, peloidal, sandy, with tuff beds.EO-k Kalladeina Formation Limestone: ooid-oncolite packstone, recrystallised, withsilicified trilobites.EO-k1 Unnamed GIS Unit - see description Tuff, agglomerate, alkali within-plate basalt: STRZELECKIsheetEop Parara Limestone Limestone, algal and dolomitic, glauconitic sandstoneinterbeds.EOu Dullingari Group Shale, black, pyritic; sandstone, grey, white; mudstone, grey,green.Eow Wirrealpa Limestone Limestone, medium grey, micritic; basal dolomite.fe Unnamed GIS Unit - see description Ironstone, ferruginisation, undifferentiatedgb Unnamed GIS Unit - see description Gabbro, undifferentiated.hf Unnamed GIS Unit - see description Hornfels, undifferentiated.J1 Unnamed GIS Unit - see description Lamprophyric intrusives, including kimberlite.J-b Birkhead Formation Siltstone, dark grey and brown; mudstone; sandstone, buff,fine to medium-grained; minor coal seamsJ-h Hutton Sandstone Sandstone, white, fine to coarse-grained; with minor darkgrey lenticular carbonaceous siltstone and shale interbedsJK Unnamed GIS Unit - see description Undifferentiated Jurassic-Cretaceous rocksJK-a Algebuckina Sandstone Sandstone, fine to coarse-grained, with granule and pebblelayers,and shale intraclastsJK-n Namur Sandstone Sandstone, white to pale grey,fine to coarse-grained,crossbedded and quartzose; minor siltstone and mudstoneJ-p Poolowanna Formation Sandstone, white to pale grey, fine to medium-grained,crossbedded, ripple cross laminated; siltstone, dark grey;shale; coal seams and brecciasK Unnamed GIS Unit - see description Undifferentiated Cretaceous rocksK-a Allaru Mudstone MudstonePage 141 of 151