I was sent an image of "bluish" rocks in Antarctica that might be
analogues of the blue rocks seen at the Pathfinder site.
The large rock in the center of the image below is supposed to be
"slate-blue" or grey-blue. There are some smaller rocks around it that appear to be more blue though.

I found after a net search some images of rocks with a blue coloration on this page:

http://www.geocities.com/jghist/Glossary/glossary.html

I'm interested in finding other images of rocks with a blue coloration if anyone knows of any.

Another thing I'm interested in is the exfoliation of the rocks seen in the Pathfinder image. This is indicated by their rough texture and the blue deposits at the base of the rocks that clearly derive from the rock.
This type of exfoliation that leaves deposits of the rock material on
the ground is usually associated with softer sedimentary rocks rather
than harder igneous rocks. There has been speculation that the
Pathfinder rocks may have been conglomerates, a type of sedimentary
rock formed in turbulent water conditions.
And the bluish rocks in the Antarctica image do not have the rough
texture of the Pathfinder blue rocks. The bluish rocks in the Antarctica image are igneous, which makes me wonder if the Pathfinder rocks are in fact sedimentary.

Bob Clark

cf.
Re: THEMIS visible color images.
Posted by Robert Clark (68.81.141.219) on 3/8/2003 6:09:41 PM
In Reply to: Re: THEMIS visible color images. posted by Robert Clark on 3/6/2003 10:35:52 AM
http://habitablezone.com/space/messages/31946.html

Rocks from Taylor Valley, Antarctica