Within the now relinquished portions of the subject licences, as part of a regional search across several tenements in the Billa Kalina district for possible kimberlites or diamonds, Flinders Mines carried out scout exploratory drilling in two campaigns during 2002 and 2006. A total of 23 vertical aircore holes for 630.4 m of penetration were completed on a 4.5 km offset grid spacing (i.e. 1 hole per 25 square km) to look for detrital diamond indicator minerals which could have been deposited in the basal strata of the Jurassic Algebuckina Sandstone. Samples of these strata were obtained from 9 of the drillholes and their heavy minerals examined mineralogically, but all were barren of diamond indicators, suggesting that no kimberlites of the target age exist in this vicinity. During August 2007, joint venturer Eromanga Uranium conducted part of a combined airborne TEM and magnetic survey across the now relinquished portions of the subject licences, using a Eurocopter Squirrel helicopter with the TEM towed array suspended at a nominal height above ground of 30 m, and the magnetometer mounted at a nominal height of 45 m. The survey lines were oriented north-south, with a 1 km spacing. Processing and interpretation of the TEM data showed that the Mesozoic and younger cover sediments in the area on average are about 30 m thick. In one place located about 15 km west-southwest of William Creek, in the NE corner of EL 3256, it was noticed that an airborne REPTEM conductivity high anomaly coincides with a regional gravity low. Eromanga Uranium decided to test this likely sub-basin feature for both its Mesozoic sandstone-hosted sedimentary uranium potential and its Permian coal potential, by conducting a limited programme of vertical rotary mud drilling. During September 2008 the company drilled and geophysically wireline logged 3 holes totalling 756 m, each drillhole being 252 m deep. These holes showed that the target stratigraphic units, the Algebuckina Sandstone, the Mount Anna Sandstone and the Mount Toondina Formation, are present in both oxidised and reduced redox states. All of the holes contain Permian lignitic material, but only in negligible amounts. The gamma ray log that was run in hole BPRM002 detected a minor radiation peak value of 175 counts per second that corresponded to a weakly lignitic claystone bed intersected at 106.6 m depth. Three sets of drill cuttings that span this interval of the hole, i.e. from 104 to 110 m depth, were assayed for uranium and thorium in the laboratory by XRF spectroscopic methods, but only yielded an insignificant maximum uranium concentration of 12 ppm U. The downhole resistivity logs run in these drillholes recorded anomalous conductivities of between 470 and more than 600 microSieverts per square metre from strata at the base of the Cretaceous Bulldog Shale, which explains the locally anomalous airborne TEM response.