Greenfields uranium exploration of Mesozoic and Cainozoic sediments was carried out over an interpreted synclinal feature on Murnpeowie Station, in an area located between the Mount Babbage Block and the Willouran Ranges. The target was possible stratiform or conglomerate type sedimentary uranium deposits of a kind similar to that discovered near Lake Frome, on the far side of the Flinders Ranges. Proterozoic acid igneous basement rocks of the ranges were regarded as a plausible source of the uranium. A preliminary field inspection of the Murnpeowie region had earlier discovered sparse and minor fracture-filling secondary uranium mineralisation (tyuyamunite) within outcropping Tertiary fluviatile sediments in the Lake Arthur area, although the extent of the occurrences on the sides of bluffs and buttes did not seem to be large enough to indicate economic prospects. Initial work comprised two aerial radiometric surveys, the first covering 1216 line miles on flight lines 2 miles apart at 300 feet mean altitude, using a four channel spectrometer, while the second survey gave more detailed coverage to a 2470 square mile area, recording only total count by scintillometer along 4380 line miles of profiles spaced 0.5 mile apart, flying at 250 feet mean altitude above the ground surface. The latter survey found 41 radiometric anomalies considered worthy of follow-up. Examination of the anomalous areas on the ground discounted many of these anomalies, leaving 14 that fell within nine discrete areas having particular geological characteristics. Importantly, the surface radiometric anomalies were shown by auger drilling and sample radiometric logging to occur on a duricrust profile, developed at several levels in the outcropping or shallowly subcropping sediments through the past action of a strong silicification process. Mapping of the extent of Cretaceous sedimentary units indicated that they are essentially non-prospective: the marine Marree and Blanchewater formations are too fine-grained and don't contain any radiometric anomalies, while the basal, coarser non-marine clastic beds of the Village Well and Trinity Well formations pinch out basinwards, being restricted to lying close to the edges of basement blocks. The Tertiary Murnpeowie Formation was seen to host the majority of radioactive source beds (again by analogy with Lake Frome results), but in this region it constitutes a much thinner interval of the cover rocks. However, the field examination did find that there is a widespread conglomeratic facies within this formation, ranging between 2-25 feet thick, which has a consistent distribution across the licence area. Mapped current bedding dips in the Camp Hill locality suggested a depositional slope heading from the ESE to WNW. A programme of stratigraphic drilling was carried out next (27 air/mud rotary holes for a total of 5890 feet), drilling to an average 300 feet depth in holes spaced a mile apart, principally along a SE-NW orientated line between the George River valley and Murnpeowie Homestead, to cut across the main tectonic structures and to follow sedimentary trends downslope. Two secondary, parallel lines of drillholes were also put in to give a SSW-NNE pattern extending along the Murnpeowie Syncline and the Koortanyaninna Anticline, but the latter holes did not discover evidence of these features persisting into the pre-Quaternary subsurface. Only very low radioactivity was recorded from throughout the entire cover sequence of Cainozoic, Tertiary and Cretaceous sediments; a slight increase in background radioactivity was usually seen at the top of the Cretaceous sandstones and/or at the base of the lowest Tertiary shale/sandstone unit, but no mineralisation was observed during inspection of the drill cuttings. This target section appears overall to be too oxidised, too thin and also largely lacking in organic matter, to be suitable for hosting roll-front style uranium deposits.