This publication represents the work of many officers of the Geological Survey, over a number of years from 1946 to the latter part of 1953. It includes descriptions of the important uranium deposits of Radium Hill, Crockers Well, Mount Painter and the Mount Lofty Range, together with sections dealing with the mineralogy of each. The valuable work of officers of the C.S.l.R.O., on the mineralogy of the Mount Painter uranium deposits, is also acknowledged. The Bulletin represents an important contribution to -the knowledge of uranium deposits in South Australia, and ,is, indeed, the first publication issued by the Geological Survey dealing specifically with uranium. Includes articles on: PART 1: Geology of the Radium Hill mining field in: Uranium deposits in SA, Sprigg, R.C. (see also RB 00067) Mineragraphy and petrology of the Radium Hill mining field, Whittle, A.W.G. Radium Hill is a locus of greatly increased igneous activity, with amphibolitized gabbros of two ages, aplitic microgranites, and rare-earth pegmatites being restricted to the immediate vicinity. There were several distinct periods of mineralisation, with uranium introduction being last. The uranium mineralisation post-dates the plug amphibolites, but pre-dates the microgranites and probably the dyke amphibolites. The source of the uranium is unknown, but the soda microgranites are a potential source. The amphibolites seem to offer host conditions, in that uranium values are often concentrated in their immediate vicinity. Uraniferous lodes at Radium Hill occur as shear replacements and infillings along medium-high angled reversed fault or overthrust type fractures developed within a domed anticline (northeast-southwest major axis) in granitised meta-sediments. At least three major parallel fault shear zones have developed lodes along part of their length over a zone some 3000 ft long, and there are others relatively unmineralised. A typical association of normal and transcurrent faults displaces the lodes at intervals, and the later also cause lode splitting and inhibit ore formation locally. The original shape of the overthrust shear planes, which exhibit central flattening - possibly in part related to doming influence ? have apparently resulted in a curved form of each of the orebodies being displaced horizontally relatively to the north-east. The lode lenses, therefore, have northwards pitch in the north and a southwards pitch is anticipated in the south. Greatest lode widths appear to accompany broader changes in lode strike. PART 2: Geology of the Crocker Well uranium deposit, King, D. Appendix on petrology by A.W. Whittle. PART 3: Geology of the East Painter uranium deposits, Dickinson, S.B.; Wade, M.L.; Webb, B.P. Uranium minerals from Mount Painter, Stillwell, F.L.; Edwards, A.B. PART 4: Uranium investigations in the Adelaide Hills, Webb, B.P.; Whittle, A.W.G.