[Milsurplus] Utterly OT: Weird Snow

[David Stinson]

I'm submitting this here because it's a place I can find
people smarter than me whom I respect.

 An unusually heavy snow of about 6 inches fell in northeast Texas, 
east of Dallas, on the night of Feb. 3rd.  
While cleaning snow off my work truck,

http://home.netcom.com/~arc5/snow/truck.jpg

I noticed a layer of snow with a pink/orange tinge.  
Snow fell for about an inch, 
than the orange layer of about a quarter inch, then the rest above 
looked normal.  I've seen snow contaminated by atmospheric dust 
before- this looks very different.  
Here's a photo with the color saturation enhanced 
so you can see the weird stuff:

http://home.netcom.com/~arc5/snow/Contaminant.jpg

The layer is general over all the snow around here.

Any ideas?
Regards,
David S.