Hi Hort,
Is reply 397 the second attempt at getting a sample from 'Stone Soup' to the MECA? They were hoping that the space between two polygons would have concentrated minerals/salts and were digging deep.
The colour seems a bit 'off'. I base that throwaway line on the deep green colour of the scoop sides as compared to (for example) your image 353. But if we accept that this is effectively a false colour image then there is a clear difference in the makeup of the soil. Mayhap they have been successful in their endeavour.
