Hi,

Can you please have a look at this image from Nasa Opportunity site:
http://marsrovers.jpl.nasa.gov/galle...9P2298L2M1.JPG
(mind the wrap is there is any...)

from the lower right corner of the image, up to the center, there
looks to be a smooth reflective material.

The rocks and ground surrounding are rough and structured, what is
this smooth material made of ? Is this just sand ?

If this was a b/n picture from Earth, I would swear this is Ice.

Especially, note the region where the material borders with the
outcrop adjacent, lowert right. The color of the material looks
differentiated in that region... suggesting something like there is a
gap of air under the "ice".

Also remarkable is the cluster of dark ground, in the center left of
the image, near the central outcrop. That may suggest melted ice
wetting the ground underneath.

I have not experience in geology, so if you have better and more
reasonable explanations I will be glad to read about!

Cheers,

Greg Ruo