Not only looks "moist" versus "dry" but the spherules are back on top...
Any ideas what is going on? Any news on the track studies? Is it really "moist" versus "dry"?... if not why we are seeing these changes in color? What is causing this type of weathering...? Why is this weathering too fast? ... too slow? ... just rigth?
In addition why there are more spherules visible on top of the old track? Is it because the wind has blown dirt away from them exposing back the spherules... ?
