Fig. 6
From: A geophysical investigation of the fairy circles in Nebraska for geologic hydrogen exploration
Terrain slope calculated from DEM (left) and Uranium (eU) channel of the radiometric data in the same area. The location of fairy circles extracted from slope data are shown as ellipses in the radiometric data. The circles remain to be located between drainage systems at this scale, and there is no correlation between the areas with multiple fairy circles and the regional-scale radiometric data.
