Sigh. Just when I think I understood what I am ...

Sigh. Just when I think I understood what I am looking at...

OK, the image of the soil dumped in the trench in reply 447 was taken at 7:48 -- between the two RAC exposures in reply 449. Notice all the very bright flashes from dumped the soil.

So the timeline is:

7:26 - soil scraped from trench
7:46 - little soil and white stuff in scoop
7:48 - soil dumped in trench
7:51 - little soil and white stuff in scoop

The only thing that makes any sense to me at all is that the soil scooped was first dumped somewhere else, the scoop was then imaged and then the soil was picked up again and dumped in the trench and then the scoop was imaged again.

What could possibly be the reason for this action? Perhaps testing if the frosted soil could collected?