The Mossbauer Spectrometer results are in for the "Adirondack Rock".
It's Olivine Basalt apparently; lots of Olivine, Pyroxene, and even a little
Magnetite thrown in for good measure.
It's an 'ordinary' rock, not much different from the rocks in your backyard.

I've, reluctantly, have had to agree with Nick that Spirit's landing site
is now "bone dry". That part of Gusev Crater may never have held much water, if any, including the
frozen variety, even a long time ago.
I hope I and Nick are wrong about this depressing conclusion.

The area around Mer-A rover "Spirit" is obviously rich in salts, but
I think Nick has given a persuasive hypothesis as to how they got there,
without invoking H20.
But I do have to ask Nick, what's with the vissicles (Is that the correct term for holes in rocks?)
in the microscopic image of that rather 'ordinary' Olivine Basalt?
I do not recall seeing a sample of Basalt with such vissicles, but I'll
gladly stand corrected if you could show me a few samples (via suitable internet URLs and links).

cheers.

Jacob

The results coming in from "Opportunity" are...promising & exciting.