Fig. 4

Survey area and airborne radiometric survey data (cut to coast). a Simplified geology based on basins identified by Leveridge and Hartley (2006). HG hangman grit (sandstone) formation, P Permian formation, BF palaeogene Bovey formation. Five outcropping granites are identified in white. b The radiometric ternary colour image obtained using the three radioelement ground concentrations