Then and Now, Changes over time Options

[MizarKey]

Of course we've seen similar side by side images showing the changes between the years. I never get tired of them...

Here's a couple...from 06/05/2000 M1600291 12.02m/pixel and 08/16/2005 S0901626 3.21m/pixel

I rotated M1600291 so it would line up with S0901626. I didn't really scale them efficiently, M1600291 appears at 2x while S0901626 appears at 0.5x

You can see that a couple of the 'seeps' (dust slides or whatever) are new. The other section I enlarge 2x from S0901626 I thought interesting as the 'dust' passed over two outcroppings but only made them slightly darker while the rest of the trail is quite a bit darker...I would think the darkness would be more uniform...maybe the dust didn't stick to the outcrop so much?

Attached thumbnail(s)

 

[Guest_Richard Trigaux_*]

I think the right image is too blured (compared to the left image) so that it is difficult to get any conclusion about a change. But you are right, MizarKey, we must stay alert as such changes are likely.

In some images, the dark stains strongly suggest they are made of some moisture flowing freely on the surface, and they raised much discutions on "another" cooks forum. But such an explanation is very unlikely, the explanation of dust flows is much better. But to hold, such an explanation requires that the slope is very smooth, also made of fine particules, like a dune equilibrium slope. A slope made of stones would not allow so easily for dust flow.