The great majority of lower Palaeozoic rocks in the Stansbury, Arrowie and Warburton Basins are of Cambrian age, although a few Early Ordovician fossils have been reported from drillholes in the sub-surface Warburton Basin. The Cambrian is the only period within the Phanerozoic that is stratigraphically partitioned without using formal international stages and series. Traditionally, the Cambrian has been subdivided into Lower, Middle and Upper Cambrian Series, although exactly what constitutes these subdivisions has been a matter of considerable controversy, both in Australia and elsewhere. The subdivisions used herein are those in Young and Laurie (1996). The Cambrian time scale of Young and Laurie (1996) places the base of the Cambrian at 545 Ma, the base of the Middle Cambrian at 509 Ma, the base of the Late Cambrian at 498 Ma, and the base of the Ordovician at 490 Ma. Under this scheme the lengths of the Early, Middle and Late Cambrian are 36, 11 and 8 million years respectively, with the Early Cambrian occupying almost two-thirds of Cambrian time. The correlation of Cambrian fossiliferous sediments from continent to continent has also been a matter of considerable debate. For the purposes of this report the intercontinental correlations of Geyer and Shergold (2000) are used. A detailed explanation of the Australian Cambrian biostratigraphic scale is given by Shergold (1996); it is discussed herein as appropriate. The Australian protocontinent was located within the zone of tropical carbonate development during the Cambrian, as part of Gondwana. Palaeomagnetic work suggests that, in the Early Cambrian, Australia was probably located between the equator and about 30 degrees N. Kirschvink et al. (1997) and Veevers (2000) suggested that the Cambrian was a time of rapid continental motions, with Australia rotating anticlockwise by about 90 degrees during this period. The maps of Eldridge et al. (1997), as used in Brock et al. (2000), also suggest an anticlockwise rotation, but only of about 15 degrees.