South Georgia and its offshore islands in the South Atlantic presented by the British Antarctic Survey on a geological map at 1:250,000 with geological units coloured in dark or light tints representing exposed (mountains or nunataks) and inferred geology (under ice, snow or vegetation). A separate panel shows the Barff and Greene peninsulas in greater detail at 1:75,000, and the map also includes four geological cross-sections and a list of references used in its compilation.