The central Gawler Craton is blanketed by thin sedimentary cover that ranges in age from Neoproterozoic to Quaternary. Locally, though, such cover can reach a maximum of ~500 m thickness in Permian glacial valleys or rift structures. This guide focusses on the features of younger Phanerozoic sediments overlying the central craton, which occupy four major basins, namely, the Arckaringa (latest Carboniferous - Early Permian), Eromanga (Late Jurassic - Early Cretaceous), Eucla (Middle Eocene to Quaternary, mainly palaeochannel deposits) and Billa Kalina (early to late Tertiary) basins. Crystalline basement underlying the cover sequences described in this report reflects a long and complex history of formation variously involving multiple processes of deposition, volcanism, magmatism and orogenesis. Although not discussed in detail, the pre-Neoproterozoic basement has had an influence on the nature (texture, mineralogy and metallogeny) and distribution of younger cover sequences. Note, however, that the unmetamorphosed and undeformed Mesoproterozoic Pandurra Formation (existing to the north-east of the Harris Greenstone Belt area), which is traditionally excluded from the definition of crystalline basement, will not be considered further herein. The Gawler Craton is an ancient crystalline shield, comprising Archaean to Mesoproterozoic metasediments, volcanics and granites, that has been tectonically stable, with the exception of minor epeirogenic movements, since ~1450 Ma. The craton's materials record crust formation and tectonothermal events in the late Archaean to early Palaeoproterozoic (Sleafordian Orogeny), Palaeoproterozoic (Kimban Orogeny), and Palaeoproterozoic to Mesoproterozoic (Kararan Orogeny). Major basement lithotypes formed during these events include the Archaean Christie Gneiss, Kenella Gneiss, Lake Harris Komatiite (and associated units), Palaeoproterozoic orogenic intrusives (formally known as the Lincoln Complex), various Palaeoproterozoic metasediments of restricted areal extent (including the Tarcoola Formation) and late Palaeoproterozoic orogenic intrusives (the Tunkillia Suite). Important components of the basement in the study area also include late Palaeoproterozoic to earliest Mesoproterozoic collisional to anorogenic intrusives of the St Peter Suite, and of the uraniferous Hiltaba Suite (and associated aerially extensive Gawler Range Volcanics). These units, including the Pandurra Formation, are intruded by basic dykes of the Gairdner Dyke Swarm. The aim of this guide is to help mineral exploration companies working in the Gawler Craton to appreciate the extent of sedimentary cover, and to assist with their recognition of sedimentary units that overlie basement targets. The guide also highlights the mineral potential within the sedimentary cover, including for groundwater, coal, placer gold and diamonds, uranium, heavy minerals, clay minerals (including palygorskite), celestite, gypsum and precious opal. The study focusses on the Harris Greenstone Belt area, but has been broadened to include all of the central Gawler Craton. This area includes the BARTON, TARCOOLA, KINGOONYA, FOWLER, CHILDARA and GAIRDNER 1: 250 000 map areas, and the northern parts of NUYTS, STREAKY BAY and YARDEA.