Following on from the highly successful Gawler Craton - State of Play 2002 conference held by PIRSA in Adelaide in December 2002, the Gawler Craton Team of PIRSA's Geological Survey Branch has recently undertaken a major excursion across the craton. The excursion presented, for the first time in the field, new geological advances and exploration criteria related to the metallogenic and tectonic evolution of the craton. The excursion also served as the launch venue for the first in a major new set of products for the area, arising out of collaborative research over the past decade with Geoscience Australia, the national CRC LEME group, the University of Adelaide, and Melbourne's Monash University. The event commenced with an introductory BBQ and core viewing session at the PIRSA Core Storage Facility in Adelaide on Sunday 7 September, where participants received their excursion guides and field kits. The core display showed numerous examples of mineralisation which could not be seen clearly on the field trip due to lack of outcrop. The trip was designed to encompass basement, regolith and palaeodrainage aspects of the economic geology of the Gawler Craton, and drew a diverse range of 27 government, academic, mining and exploration geologists, as well as media and business development representatives. The party departed Adelaide on 8 September, with eight days set aside to cover more than 4000 km of largely unsealed roads and tracks. The intensive itinerary included the Moonta - Wallaroo district, the Wheal Hughes mine, the Cultana Inlier, Iron Duke mine, Glensea gold prospect, southern Eyre Peninsula, Barns gold prospect, the Gawler Ranges, Tunkillia gold prospect, Lake Harris komatiite area, Tarcoola gold prospect, Kingoonya Palaeochannel, Challenger gold mine, Mt Woods Inlier and Prominent Hill copper-gold prospect area, and the Olympic Dam mine. Two new products were launched in conjunction with the Gawler Craton excursion - A surface geology of the Gawler Craton map (Cowley and Fairclough, 2003), and an Interpreted crystalline basement geology of the Gawler Craton map ( Fairclough et al., 2003). Both maps are presented at a scale of 1:1 000 000 in their full-size versions, and are the result of 10 years of evolving thinking regarding the craton. A number of recent ideas concerning the structural and tectonic evolution of the Gawler Craton have been portrayed on the latter map. The most obvious aspect of this is the use of a time-space plot ('cladogram') rather than a traditional legend. For the first time, an attempt has been made to portray recent and historic geochronological data in the legend and as sample points on the map. New tectonic units which have been delineated by university thesis work for the western, central and eastern Gawler Craton, respectively - the newly defined Ifould Complex, Tunkillia Suite and Munjeela Granite, are here depicted for the first time. Metallogenic aspects of the craton (including delineation of the Fe oxide-Cu-Au Province and the Central Gawler Craton Gold Province), arising out of collaborative research between GA and PIRSA, are also included. Other new data published on the map include re-interpreted boundaries of the craton, and revised tectonic domains (superimposed on a total magnetic intensity image). For the first time, the notion of 'mobile margins' has been introduced to delineate areas where metamorphic and/or structural modification has excluded rocks from the strict definition of the Gawler Craton. The protoliths, however, are thought to be related.